Wish I would ovulate :-(

 I'm so fed now, I've been ttc for a few years now, I already have 2 children which I had no problems concieving, I've been referred to the hospital an tests showed I wasn't ovulating when I should be, they offered me ovulating tablets but which they won't give me because I'm over weight, I'm trying so hard to lose the weight and hoping that I'll just ovulate naturally again but I keep losin hope and feel so alone and discriminated for being a bigger girl :,-(