Cramps at 6 weeks pregnant

I’m six weeks exactly today and I will randomly get mild cramps. It feels like the cramps I get right before my period starts. They’re really mild but I’ve been getting them randomly since I was 5 weeks. They seem to really be noticeable when I have a full bladder. This is my first pregnancy and everything worries me. Is mild cramping normal at 6 weeks? When does it usually go away? Thankfully I haven’t had any bleeding, just some light cramps here and there.