so confused ?

So, a couple of days ago, I had a very faint positive on a pregnancy test. I am officially 17 days late for my period. My periods have always been SUPER HEAVY, and cramps are outrageous. I woke up this morning and wiped, and got a pinkish discharge back, and then only spotted throughout today. (Not even enough to fill a panty liner from 3 pm to 11 pm) I've had seriously sore Breasts, and been feeling nauseous, so I thought I was pregnant.... can anyone help me and tell me what's going on?