I am taking cerazette , the mini pill , and I have had some light bleeding since it started, and 1 normal period. 2 weeks into my second month, however (and therefore about 10 days early for my next period) I have heavy bleeding. The blood is very runny (no clots, lumps or mucus ) and there seems to be a lot of it - I use a menstrual cup and after 6 hours it was half full, whereas normally there will only about half of that. Is this normal?