Hello doctor, i had unprotected sex on the 11th and 12th 2 weeks before my period my period is due on 23rd of this month chances of pregnancy?

Yes, great timing: For a married couple trying to have a baby, that would be a good time to have sex. Ovulation usually happens about 2 weeks before the next period. For women trying to not get pregnant, that would be the time of month to be sure to use 1 or 2 types of birth control (the most fertile days are often from days 11-16, for women with 28-day long cycles).