How early do your period symtoms show?

Shannon
I want to know if this is just me or if it happens to others as well.... Sometimes I get no symtoms of my period's arrival at all, just slight cramping right before I get it. Then my period is a smooth ride from there, but sometimes I feel them symptoms like a week early. Sore boobs, I am bloated like a cow, and all I want to do is eat. I have also noticed that when I use the restroom, there is a slight cloudiness in my urine. ( sorry for the tmi, I don't know if that is a sign of something being wrong or what ) once I get my period from times like this, it is hell. I am so miserable, I get knee dropping cramps, I get so dizzy, I am in so much pain for like 3-4 days. Does this happen to anyone else? Help!