question: I have been trying for my second baby for almost 20 months , had a miscarrage (blighted ovum) in April 2013, followed by surgical removal, after which my periods have never returned. Scans and blood tests all normal.slight bleed this month for a matter of hours. Have now been prescribed norethisterone to takedown for 7 days from what I believe will be day 21 of my cycle. Should I be using other contraception. Worried that I am taking ovulation tests at the same time and have just picked up an lh surge?