I have put about 2 stone on in 10 months on setraline, I am on 50mg a day. I start a diet tomorrow as it's my birthday in April and I want to drop a dress size by then (am a size 12 and want to be a 10 like I was before the sertraline). Is it possible to lose weight on Sertraline or am I wasting my time and should just stop the meds to lose weight?