Clomid cycle question.. please answer. Possibly TMI

I have been on clomid and femara the last 6 months. October, November and december 2014 was clomid, January and February 2015 was femara and this last cycle (march) was clomid again. I normally bleed for a full 5 days. I started my period Sunday (easter) and it was over last night. It was heavy flow with clots and all. I was supposed to be starting another round of femara this month but with only a 2 day cycle it is way out of the norm for me. I was wondering if that's normal? Anyone else have that experience? I don't want to take to fertility meds if there is a chance i could be pregnant. Day 3-7 is starts today and i need help!