Cramps after orgasm TMI

Ariana • 28 years old, due 8.31.16 with baby #1 after miscarriage in October
This afternoon my husband performed oral for me and right after I orgasmed I started cramping really bad. It lasted for a few minutes, there wasn't any spotting or bleeding, but it was kinda concerning. Anyone else experience this? I'm 5w3d. Should I avoid orgasm for a few weeks? I'm extra concerned because I miscarried at 8 weeks in October so I don't want to mess this one up.