Another newbie

I had gastric bypass almost 6 years ago. I went from 354 pounds down to 157. At 6' tall I was a little underweight. Two years ago I started having problems from arthritis and fibromyalgia. My condition has really disabled me and for a long while I was bed ridden. Even now I can get very little activity in due to the pain. Because of this I regained back up to 234 pounds. I'd really like to get back down to 180 pounds. Thats a really good weight for me and I have a ton of fabulous clothes that would fit me if I could get down there. It's so frustrating to me to have gained this weight. I feel like a total failure. Right now I feel like my willpower is strong. I just hope that it lasts.