Hi, chances of having getting pregnant during periods are very very slim slim but not zero. Remember that the withdrawal methods as he used as a methods of contraception is very very less effective. In your fertile period with that method, you still stand very high chances of getting pregnant., There are many options of contraceptive methods which are effective that do exist. Discussing this with your family care physician could be of help in deciding on the type to use. however, if you fail to see your periods, do a pregnancy test, but your chances of being pregnant during the menstrual period are extremely low but not zero. Hope this helps as I wish you, Best regards, Luchuo, MD.