3 days late and heavy bleeding

La-la

I was three days late and then my period started. It was pink at first the got red like a normal period but this isn't my normal. My first day it always light but feel pressure in my vag because of my uterus. This isn't that it's very heavier and I've been cramping and feeling pressure just in my pelvic area... not like a expanding uterus feeling if it makes since. It's just a weird period or what it maybe.. has this happened to anybody else