Hi, I was prescribed norethisterone to delay my period and took the tablets for around two weeks. I then had my period 3 days after stopping taking the tablets so assumed everything was normal. However, I was due my next period 4 days ago and it still hasn't come. I don't think it's likely I am pregnant but this has worried me. Is it possible that my period is delayed as a result of taking norethisterone a few weeks ago? Thanks for your help!