@kanej I agree with the others, a second opinion is definitely called for. It can't hurt and it may help a lot. I went a long time without a diagnosis and I learned my lesson from that.
I can really sympathize with not being able to go to the gym affecting you. I have a very active son in his 30s and working out is essential for him, not only because he likes to be fit, but he needs that to work off stress and excess energy. I go to my health club about six days a week and even I get depressed when I can't go for a while!
JK