I had pinkish blood show up after sex two times also I had this intense nauseaus feeling in my low abdomen right after sex and a bit of cramping. It was an awful nauseaus feeling. Has anyone else experienced this? It scared me. I wonder also why the nausea is so concentrated in my lower belly. My m/s usually isn't felt there--just during/after sex. I havn't had any other miscarrage symptoms.