Sex at 38 weeks

Clairexoxo

My husband and I had sex this morning before he left for work. All morning I was having constant period like cramping. Around lunch time I started having sharp painful contractions but they aren’t consistent or timeable. They are just really random and I’ll have one 20 mins apart, then 7, then 12, 30, etc. Does anyone know what could be going on? If this is labor I just wish I would get a sign to go to the hospital like my water breaking or them being consistent. Did anyone else have this happen?