I am taking norethisterone to control very bad blood loss and clotting. I thought that this would also act as a contraceptive and me and oh have been dtd unprotected. for some reason today i goggled it and it turns out it does not prevent pregnancy i have no idea if i have ovd but then again i could have so im putting myself in the 2ww i finish these tabs in a few days and should have a bleed 2 to 3 days later i guess i will just have to wait and see