When does cramping in pregnancy become abnormal?! Answers are HIGHLY appreciated!!

Laura • ♥️Momma to 2 beautiful boys! Carter Liam 2/17/18 & Jonah Gray 12/17/19 ♥️

I am 22 weeks pregnant and today I woke up with period like cramping. I tried to drink water and it helped a bit but they didn’t entirely subside. The cramping has been on and off for the rest of the day. I have a heartbeat Doppler and I checked his heart related a few minutes ago and it ranged from 123-152 which I believe is fairly normal??! Idk do you think I am over reacting or should I be comcerned this is the first time I’ve had any cramping at all since 8 weeks! Please help!