i have been off the depo provera injection for nearly 12 mths in the hope that it would be out of my system in time for my wedding in 5 weeks, cycles were originally every 10 days however are now been 26 - 30 days. Through out this time my period has lasted almost 5days and been fairly heavy and painful, cramping has accurred during menstruation and midway, however, im wondering whats happening i had unpotected sex on the 5/5, started my period the next morning which, was heavy for one day then lighter for two days with a varied flow over the two days (stopping and starting), nothing on the third day but, the fourth day cramping contined and when wiping myself following going to the toilet brightish blood was wiped away (this happened once) and the cramping has continued off and on since then.