Hi Mamarose,
Welcome to the forum! I'm sorry you're having so many issues. I am another person who gained a lot of weight from the prednisone. I was a teeny tiny thing when I was first diagnosed. 105 pounds. about 8 months later, and 40mg of pred every day, I gained 75 pounds. That was a lot for me. I've been yo yo'ing back and forth between 140 and 160 for a few years now. Very annoying. So I know what the weight gain is like. It's hard. Discouraging.
I don't have any experience with gastric bypass either. Considering your health and medications, if I were a doctor I don't know if I'd recommend the procedure. The risk of infection and complications is high for you. It's a risk for anyone, even someone with no other health issues. I'd definitely get more than one opinion on this. Get lots of opinions and really research the procedure. I don't blame you for being nervous about it. I would be too.
I hope there someone here who has first hand experience for you. I look forward to getting to know you! You sound like a lovely woman who will fit in perfectly with all of us! We like to have fun here too!! Every now and then we'll get a thread going that has us all in stitches. It's good to laugh at ourselves every now and then!!
Merry Christmas and Happy New Year to you!
Ginny