Hi I would like to find out what are the side effects of stopping progesterone. I had a d&c in mayand the doctor put me on 5mg progesterone for 3 months which ended on the 28 sept. My last period was on the 6th of September. We had unprotected sex on the 21st and 23rd. Now my period has been delayed for 3 weeks. Could the progesterone delay my period. I don't have any symptoms of getting my period soon and the pregnancy strip test has been negative