Ok, around the 18 of March I ended up messing around with a friend of mine. I was wearing my clothes, however, he was not. There were many occasions, during this night, that his penis was near my vagina...but there was the layer of my panties and pajama pants that were blocking insertion. Now, for the last two months my period had came on either a day or two early. This time when my period was supposed to come on...by 28 days...which is how my period usually functions..came on a day late. The 28th day and before then I had the usual PMS symptoms and when I used the bathroom I could see a faint pinkness in myu discharge, but, no period. The next day, in the morning my period came on. My period lasted for the usual time period and I thought everything was ok. Not mentioning the fact, why should I be worried. I did not actually have sex. Anyhow, now two days after my period ended, my breasts have been slightly tender at the nipples...not as much as the usually are before my period. BUT, I also have this burning sensation that shoots through them. I have been experiencing a little heart burn...so I thought that might have been the cause...I really dont know. I am confused and worried because I have only had sex twice in my life...a long time ago, and now I am worried that this time, when I do not have sex, I am pregnant. Oh yeah, just to be sure...the second day my breasts were burning I took a HPT...it was negative...But I am still worried. Maybe it is too soon to tell...could I be pregnant? please help me out.