Starting a new anxiety medication again

Due to my background and how my family viewed mental illness, I haven't been able to get treatment for my anxiety for the longest time. When I was finally independent, I was still hesitant on getting help, because I was lead to believe my whole life that it was weak to ask for help. I only started my first medication in the past year and have switched around a few times. These tapers have started to get to me and my health has been declining with each taper. I recently started Lexapro, and the main side effect has been weight gain. Although this is a huge improvement from horrible nightmares and night sweats, the rapid weight gain that I haven't been able to work off has greatly affected my self esteem. On the bright side, Lexapro seems to be working, which is also another improvement from my other meds. A new stressor has entered my life, but the amount of anxiety I feel is significantly less. I'm hoping this one is the last medication I will be on, I'm feeling optimistic :)