Hey I need some help figuring this out. 

I am three days into my cycle and although Its been a light flow all I have is this pinkish bright discharge . Ive been cramping hard that makes me sick to my stomatch, I vomited yellowish stuff once and I'm bloated. This is the first time this has happened to me I read online that it could be the start of my cycle, but why is it taking long to get here? Or the sign of pregnancy in which I am highly in denial It has been four months.