Thanks for consulting us.
The use of Norethindrone
( The active ingredient in Regestrone
) is contraindicated in pregnancy
When Regestrone is taken at the time of the development of fetus from 8 weeks onwards of pregnancy the female fetus may show signs of musculanisation, but no problem in a male fetus.
In your case, pregnancy is probably less than 8 weeks & at this stage the rule of "all or none" usually applies, that is if external insult occurs pregnancy vanishes. If insult is not sever nothing happens.
So, I think you are still in the safe window & can continue with the pregnancy.
Best wishes & hope for the best.