Pelvic pressure & cramps

I have a question mommas. I’m almost 38 weeks and I’ve noticed that when baby moves I get this intense cramping feeling in my uterus and lower abdomen. It hurts so badly that it steals my breath and I have to stop whatever I’m doing until it goes away. It’s a lot of pressure and it gives me this sensation that he’s going to fall out . Also , in my stomach and sometimes my lower abdomen I can hear this really weird popping sound ? Is this normal? I never experienced this in my last pregnancy and am just a little concerned.