So... I was on 2.5 of femara for cd 3-7. Went in for my ultrasound on cd 14 and my follicles weren't big enough (4  follicles at 13mm) so dr canceled the cycle and had me take prometrium for 10 days to start my period. It has been 9 days since my last prometrium and still have nothing. The dr said to call if I don't start by tomorrow. Well I had a chemical pregnancy in January. Is it possible I'm pregnant? Has anyone taken longer than 10 days to start after taking prometrium? I want to get on with my af so I can start my next cycle!