Cramps and insomnia at 5.5 weeks?

Tater

This is my first baby, I’m 20 years old... and I’m almost at 6 weeks according to the app. Last night I started cramping all through my abdomen and had a slight back ache for about 10 minutes. After drinking water and walking around the back ache stopped but my cramps come every few hours. It’s not excruciating, more like a dull period cramp.. is that normal?