i had sex wen i was on my periods

Of course You can still get pregnant. You should be on the pill and if you don't want that make sure you use a condom, if i was you i'd go do a pregnancy test straight away if your not pregnant you are lucky even if he pulled out before he came you can still get pergnant.

Technically, you can get pregnant any day of your menstrual cycle. However, the most fertile days are the 2 days before and the 2 days after ovulation. Ovulation can be predicted a number of ways, so it's best to learn more about this. You might have to do some research and I recommend you learn about the monthly fertile days, so you'll be educated about when it's most risky to have sex. Every woman's body is different, so you've gotta get to know your own body first.

Start with this question: Are your cycles regular? IF so, how long is your cycle? If not, predicting ovulation using the calendar will not be possible for you. Otherwise, calculate ovulation by subtracting 14 days from the date of your next expected period. This is your fertile time when the egg is passing from the ovaries to the fallopian tubes, and on down to the uterus.

Hope this helps!