Postpartum + IVF Weight-loss struggle, HELP!

Backstory - after three rounds of IVF I gained/unfortunately maintained about 20lbs before getting pregnant at about 250/60ish.

I’ve lost weight before. At my heaviest I was 300lbs and lost 70lbs during COVID with macros and working out and got down to 235 + then lost another 50 after gaining during the honeymoon phase with the help of tirzepitide.

Fast forward I was 330 when giving birth. I’m 20 weeks PP and haven’t been breastfeeding for 7 weeks. I can not get below 305. Tirzepitide, good sleep (TW), no sugar/sweets/snacking, not overeating.

WHAT IS HAPPENING WHY WONT MY BODY DROP THE WEIGHT! Help, I’m miserable. I can’t even fit in my “bigger clothes” I’m literally wearing my pregnancy clothes. 😭