Cramping after Orgasm

9 weeks pregnant, and trying to get my sex drive back for my wonderful husband's sake! I recently had an orgasm while sleeping, which I heard is quite normal when pregnant with increased blood flow in the region, but it was followed by intense cramping for about 30 seconds which then subsided. Cramping actually woke me up from the dream-like state I was in. Dr. google says this is normal, but has anyone else experienced this? It's making me a little fearful of being more intimate with my husband.