I hope some of this helps you... what i have gleaned from trial and error really...
I broke my leg and hopped roudn on crutches. Think i overdid it (Was very active) and seemed to unbalance my body (unknown to me at time). About a month after getting off the leg plaster, got PF. GP's in my exprience diagnose it correctly and bang you on NSAIDs e.g. Naproxen). However, again in my experience, and in discussion on the medical specifics underlying how these chemicals work, we agreed that over the counter Voltarol gel you can buy in Boots is just as effective.
The PF got worse over 6 months and i was so fed up i took out a roper medical subscription and started to spend hours a day reading medical journals on the subject, I visited the top rheumatologist in Uk, saw the podiatrist attached to Arsenal and a physio wh managed team GB at Olympics. Gradually i worked out a plan which has ultimately worked for me. After 6 months of PF, achiles started playign up also.
try this - but determine to beat it as i think you will need to be ruthlessly determined..
1.Seriously ice your feet. I sat for hours with my feet in the frozen sleeves that go round wine bottles. Literally hours That seemed to be the best thing to get rid of PF - i think i just killed the inflammation by freezing it frankly. Then i was left with sesloinditis and achiles
tendonitis to get rid of.
2. Took up swimming 30mins a day and have become a bit of a seriosu swimmer. Watched loads of You tube vidoes of the various swimmign stars to get better at it. This seems to work as its not weight bearing but you spend a lot of time stretching you feet and using them as paddles. I think this worked a lot for me.
3. Changed diet completely. The only people who seemed to be 'curing' all these tendon and ligament issues completely were on quite strict diets and i was worried that if i had it too long it would trigger arthritis. for 12 weeks just ate fish veg fruit nuts seeds i.e. no wheat dairy meat alchohol or nightshade veggies. (all these things were on lists of people posting on web so i thought i;d give the lot up). After 12 weeks, started to add them back and added chicken first of all! For me, i really now limit the wheat and dairy and nightshades as i havent quite worked out which of these sets off the pain - i kind of know one of them does... they are all linked with digestive issues. There is a view that rahter bizarly these inflammatory things get kicked off following an upset stomach or food poisoning, when bacteria get through the gut wall and into the blood stream. Not a common view, but a view. So i tried to cleanse my gut through the "diet" .. and i spoke to one of the top rheumtologists about it... there are other views that the chemical interactiosn are set off if you e.g. lack certain vits like D etc. So for brekkie i now make sure i have some gluten free muesli with at least 4 different sorts of fruti e.g. bluberrise, rasperries strawbs, blackberries and chuck on 3 brazil nuts (selenium), couple of walnuts and a load of seeds with almond milk. AS much as you can eat. This is pretty much your 5 a day at start of day. Then lunch is salad and eve meal is protein (fish, chicken and veg). Strangely this diet also cured Nvak Djokovic and he started winning everything after he gave up gluten and dairy too. There is a lot in the medical journals that link fat cells to inflammatory things like tendnitis and arthritis - even in the thumb where you would not think fat makes a difference. Apparently the fat cells trigger the immune system to work in different ways and can trigger it to attack otherwise healthy cells. The diet has helped me - but i truthfully dont know whether this is because is lost a stone and half to date (so less weight on my feet) or whether it killed the inflammation or whether it was becuase i suddenly made sure i had all the vits and minerals my body actually needed to heal itself. But i have kind of got used to it and like it now and i just feel better, mor healthy per se and my bloke loves it.
4. Go to a physio - physio gave me loads of decent exercises to strengthen Core - and i now walk differently.. explained that 1/3rd of your weight when walking shoud really be from using your glutes (bum muscles) sort of from hips; then on heel through to big toe. Orthotics are meant to make you walk correctly without thinking about it but i find them uncomfy all the time so i conciously learnt to walk properly with the physio's help. This basically means boringly strengthening your core tummy and especially lower tummy muscles. I do use the orthotics sometimes if i am off on a hike but otherwise i use Go WALK shoes which are soft and memory foam - i would say they have defeintiely helped me a lot.
My overall experience is that a year down line i lost weight, feel a trillion times better and i think without me realising it, i kind of was unhealthy - didnt have the right diet to get all the vit and mins i needed; didnt do enough of the right core exercises; got body unbalanced being on crutches from one broken leg and i think it took 6 months of concerted effort on my part to get rid of the inflammation in my tendons but i think the body heals itself but you have to give it what it needs in terms of vits and stuff to do so. It was also a right pain inneck as i had to change diet, do exercises, go swimming etc i;e. bit of an overhaul. If i walk e.g. 10 miles now, then i might feel it a bit and i stick a bit of voltarol on but i am almost at stage of thanking my lucky stars i got it as now so much healthier and fitter so it was a wake up call to me.
HOWEVER 5% of people do rupture their PF and need operations so i think i would ask your GP to refere you to have an ultrasound to make sure you havnet got something seriously wrong as you seem to be in more pain than may be normal if it is continuous. Failing that ask for a rheumatlogist to check you out. hope any of above helps.