I'm seventeen, and sexually active. My periods are normal, and always have been. I have clotted before, but my mother said it was normal, and nothing was ever bigger than a quarter really. I'm not trying to get pregnant, but yes me and my boyfriend so have unprotected sex, and he does release in me. I would not be upset if I was to get pregnant, but I am not trying. I have had my periods regularly the whole time we have seen each other up untill this month. I started around the time I should give or take a few days, and I had a normal heavy period for about 4 days. Recently, about a week after, I started spotting. I asked my sister if she ever restarted a period and she said yes, sometimes all of the egg does not come out, and having sex right after your period can cause it to restart. I wasn't worried untill last night I put in a tampon around 11:30, and went to sleep at 12. My periods are usually very light during the night so I set an alarm for 3 so I could change my tampon. Around 1:30 I woke up and felt like I had peed the bed. I got up and ran to the bathroom, and as soon as I set down a very, very large blood clot came out without me having to push or pull on my tampon. I was not able to see just how large exactly the clot was because the water became immediately red, but I caught a glimpse, and I want to say it was the size a baseball. The first time my period started I was taking a shower at my boyfriends, and I started feel dizzy and lightheaded. I stepped out just in case I might vomit, grabbed a towel and tried to fan the steam out of the room. My vision darkened and everything my boyfriend was saying to me sounded far away and then i passed out. Does it sound like a possibly could have had a miscarriage? Please get back to me.