I hate asking about this online, but noone has ever heard of it.......I am 35 and have used tampons for 21 years. For as long as I can remember I get real crampy and I basically know when to put in a tampon, if I don't, the bleeding will not start. I only go for 2 or 3 days lightly. I am concerned this month because I am heavy with blood clots. I am going to the doctor, but he hasn't heard of not starting unless inserting a tampon either. Does anyone else have this problem? Thank you.