Being a FTM, sometimes I dont know when to worry about things, and when things are considered normal. Since last night, I've been having tenderness in my lower abdomen. It's tender to the touch, but it is also a little achy without touching it. The first time I really noticed it last night, was (about to get R rated) my husband and I were having sex and I was on top, and I leaned down on my stomach and it felt tender, and then when we were done, it was bothering me. Any ideas why or what happened?