Period Cramps?

So I woke up this morning, first day of week 22 for me, and I kept feeling this weird feeling in lower part of my abdomen. Few hours later the pain is worse, like the cramps you get right before you start your period. 
The research I've done says it can be because of the uterus moving upwards. Never felt it with first 2 pregnancies. Anyone else experience this? Not trying to freak out but I like knowing things I go through are considered "normal", you know?