Anxiety and weight

I am suffering from some pretty over whelming anxiety due to my weight. I am 20 weeks pregnant and I have gained 12 lbs. my doctor recommended I only gain 15 total. I feel horrible and stupid and out of control. Did anyone gain over the recommended amount and get it back off? Can I start to get it back down now with exercise and limiting? Befor I got pregnant I spent a full year working super hard to lose 70 lbs and I’m terrified that I’m gonna set myself back so far I’ll never get ba l where I was 😭😞