first you should know that there is no way that i can tell you for sure who the father of your baby is. but medically you should know that those people are wrong. it is completely possible for you to be impregnated during your period. your period works on a simple cycle: your womb builds up a blood-like lining on the walls of itself that is both cushioning and nutrient-rich; then your ovaries release an egg that waits to be fertilized for a few days or hours depending on the woman (ovulation); then when the egg is not fertilized or the body does not perceive the fertilization the lining falls away and is your period. this last part can happen while you are ovulating or actually after. every woman is different. but most women have 1 week of lining build-up 1 week of ovulation 1 week of waiting then 1 week of period approximately. the only way to know is to have a paternal test done with either a home kit or by a doctor. after the baby is born if your cycle bothers you that much you can have tests done to determine if you ovulate before during or after your period.
i've been told you cannot get pregnant during your period is that 100% true because that would be the only way i am. i got back with my ex on august 7th and started my period the same day. we had sex even with me being on my period and then the period only lasted three days. now i am pregnant and due in april and i'm starting to have doubts because i admit that i was with another man before i got back with my ex and i am currently freaking out that there is a possibility that this baby might not be whose i thought it was this whole time because everyone is telling me you cant get pregnant during your period.