Iam On Norethisterone Cause 2 Month Ago I Had Period

iam on norethisterone cause 2 month ago i had period more than 3 weeks(due to hormonal imbalance) and my gyn told me to take for few more month to make it regular and i am also trying to get pregnant.My gyn gave me clomid 50mg, 2 tablet each time (50×2)2 times per day.I finished my clomid and after some day i again started my norethisterone but the thing is i saw in the internet that norethisterone is also birth controll pills and also recording my BBT (erratic curv). Before all this I used to ovulate. iam very upset.
please reply Asap.