Hello, last week, my boyfriend and I had sexual intercourse. Although it was not sex, we have reason to believe that semen might have entered the vaginal area, but we are not sure. I had just gotten off of my period two days earlier. The next day, I felt a pain in my stomach, so I got nervous and decided that I should take a plan b. We took the plan b within the 72 hour period. Lately I have been waking up and my hands and sometimes my feet feel stiff.My boyfriend believes that it is due to something else but I am scared. I also have light headaches, and today I have had frequent urination.