5 weeks pregnant and cramping!

I’m currently about 5 weeks and 3 days with my first pregnancy and I’ve had a few very dull cramps kind of like how menstrual cramps are but last night I woke up at 3am with crazy back and abdominal cramps, I got up stretched, drank water, tried to use the restroom, and eventually it went away and I got back to sleep. Tonight I was fine until just a few minutes ago when I got in the bed to go to sleep. The cramps came back but this time on my lower left abdomen and then moved to the center. These last for 15 minutes before going away and seem much more painful than the dull cramps in the beginning. Almost like someone is pinching me from the inside really hard. Is this normal?