purity

Okay so I'm not sure if my period is late or its not coming down the way its suppose to. I know my period schedule already, but the thing that concerns me is that I've been spotting here and there. I was suppose to have it yesterday, but sometimes it comes a day later and its been the second day and it still hasn't came down. My stomach area is bloated and I have sore breasts, but nothing won't come down. I'm not pregnant I already checked so I assumed maybe its because of stress? I was stressing a little bit last week because my boyfriend had left back to his hometown so I thought maybe that could be it. Any suggestions what ever happening to me might be?

Okay so I had sex last week around the 15th-17th. I'm 18 years old and I've been with my boyfriend for two years now and it was my first time doing anal. It hurt, but I got over it, anyways he pulled out because it was hurting me too much and he came on my *** hole and he wiped it off with a towel. Now what I am concerned about is the fact that it felt like he used that same part of the towel to wipe it off again to make sure it didn't go anywhere, but it slid over the vaginal area where you could get pregnant so I was wondering what the possibilities are of getting pregnant? i took a bath maybe 20 minutes after finishing because I was kind of worrying a bit. My next period should come around the 25-27 and that's in a couple of days. I'm worried it won't come down and I've been having period symptoms such as sore breasts and a little bit more discharge than usual. So what are the chances of getting pregnant by that?