Hello It sounds like you are having some break through bleeding between your periods and what you are seeing are blood clots. I agree that it could be a miscarriage or something else is messing up your periods-there are many different things that can mess with a female's cycle, as doctornee suggested. Either way an OB/GYN needs to check you soon to determine the cause and start treatment if needed. I Hope This Helps and Good Luck.
Hi
Welcome to the MedHelp forum!
One possibility is that it is a miscarriage, if you have a history of unprotected sex. The first period that came could just be a normal period which some women get despite being pregnant. Hence take a pregnancy test and see. If you are miscarrying, it will still be positive.
Other causes of heavy bleeding which should be ruled out are fibroids, adenomyosis, endometriosis, uterine polyps, hormonal imbalance, thyroid problems and bleeding disorders.
Please consult your gynecologist regarding this. Hope this helps. Take care!
How old r u? I had that when I was going thru perimenepause. They say it's old blood.