I am 8 weeks pregnant and was prescribed progesterone approx 2 weeks ago. 2 days ago I woke up to find I had a very heavy bleed which was bright red and had what looked like bits of lining in. The hospital took some blood tests and all my hormone levels are as they should be and im booked for a scan tomorrow. what im wondering is could this be caused by the progesterone? My levels have never been an issue before, we hadffertility treatment so this was checked..a lot . could I now be producing too much? Can progesterone cause bleeding?