Is it normal to pass large clots of blood during my period? Usually my menstrual cycle starts out light and then is very heavy for about 2 days. The blood is so heavy that trying to use a tampon is useless. During those days, I have rather large blood c

Your . Your periods sound very heavy. No, it is not normal to pass large clots. I don't know your age, but there are stages of life when periods do get heavier. If you are passing large clots, then you need a gynecological evaluation. Be sure that you are up to date on your pap smear. If you have lightheadedness, fainting, or are soaking greater than 3 pads an hour, then you need emergency evaluation.