Losing Weight after SSRIs

Does anyone have any experience with weight loss after withdrawing from SSRIs? I gained 40 pounds on sertraline over the course of about seven months. I've been off of it for about six months now and have managed to lose 15, but have plateaued a bit recently. I do FB workouts five days per week and am generally active (I have a FitBit and make sure to always get enough steps, floors climbed, etc.). I eat tons of lean protein and vegetables, and occasionally check my calories in/out to make sure I have a weekly deficit of 1,000 (to lose two pounds per week).

I'm not sure what else to do. I have seen a couple doctors - the first tried to put me on phentermine (which scared me a bit since I have anxiety that is now not being treated with medication), and the second (who I saw this week) referred me to the Endocrinology department, who is attempting to enroll me in a "metabolic weight loss program" in July.

Anyone have any experience losing weight after SSRIs that they could share?