4 weeks and severe cramps

I just found out 3 days ago I’m expecting. I got 3 strong positive on 3 different tests. But 5 days ago I’ve been having bad period cramps which I’ve been getting every month before AF since I stopped BC in August. I’m still having these cramps and they’re so bad they make me have to poop or feel sick. My doctor said as long as I’m not bleeding I should be ok. Just wondering if it’s normal to have bad cramping this early.