31 years old with 4 children (8yo to 1yo). History of pre-cancerous cells (removed) from HPV. Recently have had abnormal periods (from 2 weeks long to getting them every other week). PAP and bloodwork show no signs of cancer/pre-cancer, ultrasound shows uneven thickening. Did a round of Progesterone followed by a lo-hormone birth control that gave me headaches and heart palpitations after 2 weeks, quit birth control and I have now been given Progesterone to be taken for 7 days once a month. I just started my regular cycle yesterday 12/20, when should I take the Progesterone?