I'm about to also start an antidepressant. Not sure which yet and it's nice to hear that it's improving your anxiety. My big worry is that I will take that big step to taking medication and it won't work, so it's encouraging that it's working for you knowing how much you've struggled.
BTW I can't speak to SSRIs but I felt like I had trouble losing weight while on Cymbalta. I'm not a very active person so I wasn't looking for miracles but felt like I had to work extra hard to lose any weight. I lost at least 10 pounds since I stopped Cymbalta and have kept it off. On the other hand maybe all the stress and anxiety is responsible for that. Hard to say!