Stomach hard as a rock!!

Ftm mom here, I posted the same thing in general pregnancy but i’m impatient and need answers lol

for the past couple days my stomach has been getting really hard, not exaggerating. I can grab onto my sons entire back and butt, he’s literally bulging out. idk if these are BH or him pushing himself off me, idk what to think cause it’s difficult to breath too & it keeps happening back to back to back! what do y’all think? i’m 38 weeks so i’m prepared for whatever 🤷🏽‍♀️