Frustrated with not losing weight

Today marks 3 weeks on 37.5 phen.

I am 38F, 11 months postpartum from a pregnancy that had me in bed rest from 9 weeks. I ended up losing 10 pounds during my pregnancy because of muscle wasting. Weighed in at 292 prior to starting. My all time high since gastric bypass surgery when I was 17.

I am on lexapro for postpartum depression and gained about 20 since starting that.

Over the course of these 3 weeks I’ve logged my food, ate in a deficit, make sure I’m moving (could be better at that but… baby), quit drinking and eating out and consuming sugar and the most I lost was 8 pounds, today I’m back up to 5 last.

Any tips? Is it the lexapro? I feel better but can’t decide if that’s placebo.