Confused ?!?!

So I was expecting AF on the 10th. No signs of her but all pregnancy signs. This morning when I got up I was spotting. So I put a tampon in just in case cause I was leaving for the day. I had the tampon in for like 4 hours and not very much on it. So I put another one in , for about 3 hours and it was even less and the blood was like dark brown and looked like it does when I'm on my last  day of AF. But I've been super dizzy all day , serious headache , not able to keep my eyes open from feeling so drowsy and cramping slightly all day and usually when I've started my period my first day is hell. I'm in a ball from so much pain and changing my tampon constantly. So my question is , is there still a chance of me being pregnant ?!