Awkward anal

So me and my boyfriend have been going out for a few months, and he's quite pushy so we tried anal. I was finishing my period and I had tampon in. His penis wasnt in properly i dont think, and i ejaculated, and i went to the toilet after, and it was quite wet around my vagina, we had used a lubrication, but im just worried theres a possibility of getting pregnant, I'm 16, and i really dont fancy telling my parents im pregnant. I wondered whether the tampon could maybe of blocked any semen that may of go there? The day after anal i finished my period, i know that there is a very unlikely chance that you can get pregnant after your period, but I'm just incredibly worried. Please Anne, help me.

First off, don't do anything you don't want to do. Secondly you're wrong, the easiest time to get pregnant is the week after your period. Thirdly, the chances are very slim, when women try and get pregnant they have a hard time and that's with the semen going fully into their vagina. The chances of a little semen on the outside of your vagina getting you pregnant is next to none