I've been on my period for 8 days now. When I started it was like nothing just a little spotting. I was having bad cramps. The cramps have slowly stopped. Now my period is starting to get heavy. I went to change my tampon and when I pulled it out a big piece of skin come out on the tampon. I don't think it was a clot. It was a gray coulour with bits of blood on it. I've had sex a months ago and I was not on the pill. Now I am on the pill again. We used condoms. What wrong?