Unprotected anal sex 2 days b4 period then a normal period. 2 weeks later watery vaginal discharge and lower right back pain. Period or pregnant?

Back to School. One cannot get pregnant from anal sex. There is no connection to the uterus and the ovaries in the anus. You had a period. A period is the physical definition of not being pregnant. Perhaps it is time to spend a few minutes relearning the basics of what the menstrual cycle represents and how babies are made. I wish you well on this journey.