I had been having sex with a so call boyfriend, so months later I start bleeding it came out real light like a pinkish red. Then also I bleed anytime it was red this time like a period this was some weeks later. I start having stomach cramps during sex like period cramps. Sometime later I had a on and cycle like I bleed then it stop or slow down and then bleed again. Now stop all the bleeding but still have stomach cramps during sex. What could this be?