Weight loss and fiberoids

I hope there are other women out there that can relate and give some advice. I am a female age 43 and I have been dealing with weight gain and fiberoids since 2009. I tried everything under the sun to maintain weight but nothing worked. Well I guess I should say nothing works as far as losing weight. I have gained about 10 lbs and its been that way since I first got my diagnosis. Finally having my surgery in two months and i couldn't be more excited. I eat fairly healthy. But I need to know how I can get back into running without irritating my fiberoids. Any suggestions will be so appreciated.