please don't take my baby

I'm dying so it's 2:30am and this insane unbelievable back pain just hits all of a sudden and it's like no pain I've ever felt it my life!!! I have enormous boobs and I'm overweight so iknowwww what back pain feels like. so I'm sitting here wondering wtf this is. I notice I have slight lower abdomen pain but almost untraceable and I gotta pee. so basic I start by stretching. I put one leg on the ground and the one that's on the bed, Cris cross Apple sauce and lean forward almost completely. once it eases up a bit I go potty. thankfully nothing but come back still painful and not knowing what to think. I'm 12 weeks and a few days and terrified I might lose it. any thoughts? BTW if you're wondering how I'm coping with the pain my husband is an oven so I put my back on his butt and it feels like a heating pad lmao it literally took me a sec to adjust to how hot he was 🤣