Yesterday my husband and I had sex and I got a strong cramp in my lower abdomen after my orgasm that returned off an on over several hours.  Almost felt like sudden intense gas pressure.  It has happened once or twice today too. No bleeding or other issues. I thought I had felt round ligament pain before but this is different. I'm 21w 1d, could it be Braxton hicks? I am overweight so I couldn't see an obvious difference in my bump.