ok so i had a baby in jan. of course i had the normal 5wk period after that. but when it came time for my regualr cycle to kick in it only lasted a few hrs.. shortly after that i got on shot form of birth control, i didn't know i was preg. at the time and it didn't show up in the preg. tests they gave me at the drs. So i ended up miscarrying a month later its been 4wks since i micarried and the bleeding still hasn't stop since i miscarried. is that normal??

No, that is not normal and should be addressed with your doctor asap.