What medicine helped you the most?

Hi everyone! I have suffered with anxiety and depression for years! It started during my early teenage years. I use to be on Lexapro and 2 other pills for it, but they caused me to gain like 20 pounds. Stupid that I quit, I know, but I had been doing better. Recently it has gotten bad again.. I go tomorrow to get new medicine. What medicine helped you most? I would like to find one that would cause weight loss.

*EDIT*

Can NOT interfere with the birth control pill.