After two miscarriages in last 6 months, my progesterone is lower and I also tested positive for two gene mutations which predispose me to blood clotting disorders. This past cycle I was instructed to use 200 mg progesterone supp. twice daily and also lovenox 40 mg daily. I took a beta HCG 4 days ago which was negative and have been off progesterone and lovenox for three days but no period yet. How many days does it usually take?