I have very irregular periods, but a couple weekends ago I had some cramping on only one side, which I took as ovulation cramps. My husband and I had unprotected sex before and during that time period, which during it was very uncomfortable for me. On the 11th (4 days ago) around lunchtime, I went to the bathroom and when I wiped there was a pink spot on the toilet paper which felt like the consistency of semen, or also what it looks like when I "clean up" after I have had sex. Since then I have not had any other spotting or bleeding. I have had very mild cramps, but low and in the middle.