Hi Diane and welcome!
The getting up out of a chair and the stairs are typical situations in PMR and I could only get upstairs on hands and knees when my arms hurt too much to pull myself up - and down was like a toddler, 1 step at a time. But they are things that should improve dramatically with pred.
I don't know - I'm finding it difficult to make a mental map of what you have been through - but one thing I would say is that your rheumy has gone about treating PMR in a very cock-eyed way. Fast tapers don't work - it's as simple as that. Once you start to yo-yo the dose as you have done it gets harder and harder to reduce. And reductions of more than 10% of the current dose cause trouble - some people can't even cope with that without a return of the symptoms.
I was put on pred by a rheumy who was sceptical about PMR: 2 weeks 15mg/day, 2 weeks 10mg, 2 weeks 5mg. Within 6 hours of the first 15mg dose I could walk downstairs normally whilst holding the handrail. Within 3 days I was back to normal except for the tendonitis I had in hands and knees (that took months to go) - but within 24 hours of stopping the 5mg dose, at which I'd been OK, no more, I was in worse pain than pre-pred. It has taken me 4 years to get below 10mg again. But the return to 15mg DID work for me. It was the reduction that was the problem until I did a reduction of never more than 1mg at a time - and even then I don't go directly from the current dose to current dose minus 1mg. It takes me weeks of decreasing the number of days I take the old dose between single days of the new dose.
IF what you have is simple PMR, the pred should control it and most of us have never found painkillers do anything for PMR pain. I would suggest there might be two possibilities: one is that you don't have plain and simple PMR. The other is that you are what is called steroid resistant - the form of pred you are on just doesn't work in your body. It's not common - but it happens.
Certainly, the dx of the lymphoma suggests that IT might have been the original culprit for your PMR - I personally feel it shouldn't be called polymyalgia rheumatica but PMS - polymyalgic syndrome. PMR isn't the disease - it is the symptoms of something underlying that leads to inflammation which causes the pain and stiffness - "many painful muscles".
It also sounds as if you got a bit better and made the typical mistake of trying to catch up with missed tasks - and that can do a lot of damage to the muscles and lead to a return of the symptoms. We've all done it - but you sound worse than most of us as a result.
Do I gather you are in the USA? If not - where are you? And what sort of pred are you on?
I was first put on simple ordinary prednisolone which is the standard in the UK. I moved to Italy a few years ago and that meant I had to be switched to methyl prednisolone, or Medrol, which I know is commonly used in the USA alongside prednisone. The rheumy here was adamant medrol was better than prednisolone (which can't be got here anyway) but although at first it felt no different, it certainly wasn't any better. Then side effects developed which were horrendous (weight gain, a beard, muscle wasting, none of which I had had before).
After a few months I developed other problems which led to me spending 3 weeks in hospital. Soon after I had to increase my medrol dose to 20mg, taken at night as you are doing - and it still seemed to do nothing. It took until mid afternoon for me to feel any better although the morning stiffness wasn't too bad. I had been put on statins in hospitals - within days I hurt all over and couldn't walk more than about 50yds and that on crutches. I had never been that bad before. I stopped the statin immediately (no problem with the cardiologist) and slowly improved again - but it has taken a year to get back to where I was pre-medrol and pre-statin. I was also switched to a different form of pred - I went from 20mg medrol which did almost nothing to 15mg of the new form of prednisone and it was almost as miraculous as the first dose of pred 4 years before! I have been able to reduce steadily, though never more than 1mg at a time, and am almost down to 5mg/day.
This is already a long and complicated post so I won't say any more just now but can you answer a few questions for me please:
What sort of pred are you on?
What other medications are you on?
Have you been given antibiotics at any point and if so, what?
Do you have/have you had any other back problems - especially lower back pain?
cheers for now
Eileen