I have hypothyroidism. so my doctor suggested to take norethisterone acetate controlled release tablets 10mg tablets when I don't have my periods for 45 days... This generally works. He told me to have the tablet for 6 days and then wait for 7 days then I'll get my period.. I usually get it in the next following week after stopping my medicine and waiting for 7 days.. but this time it's already 4th day after I stopped the medicine. So what should I do?