I am 19 years old. I have been with the same guy for 4 years and have never experienced anything like this. About an hour ago I had intercourse with my boyfriend. Immediately after I went to the bathroom to pee, when I couldn t I came back into my room..No more than two.seconds after walking in the door of my room I was running back into the bathroom. The pain in my lower abdomen/uterine area was so intense I vomitted twice. I was sweating, shaking, and could barely breath. I was literally laying on my bathroom floor screaming and crying. What could.this possibly be?