Hi. I'm 16 and a week ago (on a monday) i had sex with my boyfriend and in the middle of intercourse he pulled out because he said he felt the condom was off. When we both looked down.. the condom was in me still sticking out and it was completely off of him. We were both scared because like 2 min before that he ejaculated. Then that week on the 20th (a thursday) i got my period as scheduled. My period usually last all 7 days but I'm on my 4th day now and usually my cramps have stopped by now but they are worse. Also, my period is usually heavy the whole time but this time it was heavy the first day, then the second day it slowed down and the 3rd day i barely had anything. this is really unusual. Last night i slept with just a pad on and when i woke up it was dry and no blood on it. when i went to the bathroom and wiped there was no blood either. i am very scared that i might be pregnant. can this happen?