Plan B and Week away from period..

So me and my boyfriend had unprotected sex about ten days before I was supposed to get my period. I'm not on birth control so he pulled out but we also had sex and hour before that so we were worried there was still cum on his penis. I took plan B right away and am supposed to get my period tomorrow but I don't know because of where I was in my cycle how plan b effects it. Will it be late? Did the pill work? Im so paranoid. I wasn't on birth control because we weren't having sex since I was sexually assaulted by a family member in December and didn't want anything to do with it but I just wanted him so badly. No rude comments please. We have a four year old daughter together and were both in our early 20s so its not like we don't know how sex works.