I anal sex, no condom and I was on my period he had a condom on but was not sure if it broke or anything... My period is a week late and I have irregular periods. Could I be pregnant.

If . If the condom broke there is a possibility that semen came out of your rectum and found it's way to your vagina. The probability of this occurring and resulting in pregnancy is very low; also compounded with the fact that you are not even sure if the condom broke makes it even less likely. To be sure you should take a pregnancy test. Best of luck.