Hi everyone, i will try to be as brief as possible 
I'm a 29-yo male, i work as a financial analyst. In Jan-2016 i was diagnosed with an anal Fissure and a Fistula as well right beside rectum. I had Fistulectomy done in May-2016, 2 weeks on bed and then back to work. Everything was fine for a year, i was careful with diet and did not let myself constipate, took minimal time on the toilet seat, have minimum 6 hours of sleep, i used the ring shaped cushions to sit for work and driving. However.....
1 year later in mid-2017 i started having pain again from time to time, very mild pain and irritation/pulsating around the rectum. But yet it is there. It arises when i'm stressed at work and sitting for longer times both with and without the ring-shaped-cushions. And when that happens i do a sitz bath to relax my rectum and go to bed earlier than usual and everything is fine the next day until the same thing happens again next week. 
I have some big questions in my mind and i have not visited a doctor yet.
1) I feel that my surgery area is weak now, is there something i can do to strengthen that or i have to live with it forever? Will i not be 100% normal again? or how can i get rid of this forever?
2) Will i need to use the ring shaped cushions for sitting all my life?
3) Is there something i've missed doing, or i'm doing it wrong?
4) Is there a cream that i should use whenever i have that mild pain?
5) Do i really need to visit the Specialist when i get that mild pain thingy next time?
I don't even know what more questions to ask. I would really appreciate some guidance and support. Thanks a ton!
Cheers,
Dani