I stopped my birth control mid April after 10 years and have had 2 periods since. Both were barely 4 days, very light, and one came 3 days early. (Was hoping it was implantation bleeding but I tested this morning and BFN) This is quite different from my period before BC (while on BC I never had a period). Before BC my periods were 7 days and a medium flow, not crazy heavy but definitely not light. They were also extremely regular, you could set a clock by them.