I was 3 weeks late, i got spotting then 2 days later i got heavy period with flesh/grey type discharge but i was suffering with cramp?

Sexually active: if you had sexual intercourse since your last period take a pregnancy test. It is quite common to have an irregular or delayed cycle once in awhile. the presence of fleshy grey tissue may be congealed blood and protein or a sign of miscarriage or tubal pregnancy. If pregnant and bleeding it would be important to know your blood type. If your pain persists go to ER. Good luck.