Cramps after sex?

Hi, I have been TTC for a while now. I have had many symptoms this month that are not normal for me at all. I'm expecting my period in 3 days and my DH and I had sex this morning. I found it a bit uncomfortable I had a dull pain in right side. TMI and we couldn't go all the way in (if you know what I mean) as it was too uncomfortable. I had to big "Os" but the cramping didn't start until he finished and boy did it hurt. I couldn't even stand up straight. I found laying down on my side with a hot water bottle has soothed the pain although it took over 30 minutes. This has never happened before. I also get the same pain on my right side when I sit down to hard. Same place that hurt while having sex? Maybe a cyst? Anyone have something like this happen and been preggers ?