Soooo...

I have been cramping since I found out I was pregnant about 3 weeks ago. Currently 6w2d. My boyfriend and I haven’t had sex since we conceived ... bad I know but my moods have been so off and I’ve been so tired. Anyway , since I’ve been cramping should I try having sex? The cramps have been coming and going the past few days. They were constant. Good to go ? Or wait to talk to dr ?