you "believe you had a miscarry" or you know for sure. you would have to go to the doctor's to see why your bleeding.
i used to spot for weeks, then i would have heavy menses with large clots.
my doctor took tests to check my thyroid gland, took a ultrashound sonogram and i found out i had a cyst on my ovary. it's small and they come and go so theyre monitoring it. i had surgery called a hysteroscopy (camera in uterus) and d&c (scraping of lining of your uterus) but they put me on the depo shot......why when this is such a controversial birth control pill. so i still was bleeding 1 1/2 months after surgery. so i was so frustrated i took my old birth control pills in my dresser, and it stopped my period in four days. so i dont credit my doctors for helping me, actually it took them a year to figure everything out. they were trying to get me to get a hysterectomy and i wasnt ready for that.
so again, go see your doctor, if you dont have health insurance try to go to the family planning center or the emergency room. you might want to get on the pill the regulate your period.

thanks for the info ^^ you have been more helpful then most "medical" websites.