I am 52 years old and am in perimenopause. My periods are unpredictable and sometimes so heavy I think I am going to bleed to death. My doctor put me on 100 mg of oral progesterone (taking the pills day 12-26). The first month, it worked perfectly. I am now on my second round of progesterone and today(day 18 of the cycle) I started bleeding. Am i supposed to stop taking it and then start on day 12 again? My doctor is away until Monday. The nurse told me to stop taking the progesterone and call the doctor on Monday. Is she correct?