I lost my virginity to a very good friend of mine about 2 days ago while I was on my period. The sex was very painful at first, but then it got better. My friend managed to pull out before you-know-what happens. We both then checked the condom andit didn't break. We even did that water test thing and no water came out through the condom. I am still on my period and right now I'm experiencing some minor cramps and my breasts feel a bit sore. Why is that?