hi, i am 21 and have had my periods for several years now, regularly. i am not sexually active at all. i started bleeding again on the expected date as usual, but today, the blood was unusally dark, heavy, thick, jelly like. ive neverrr had this before. why have i got it all of a sudden? there have been no radical changes in any aspect of my life and this has jus randomly happened. no medication (the only medication ive recently taken are painkillers for the cramps but i take them every month anyway), no unusual excercise, no nothing. so whats new happeneing here? and i always get paralysing pains in my lower back and stomach in the first 2 days of the week. ive had pains, but not thaaaat intense. still, been pretty painful. any suggestions for the new type of bleeding?