I've been on the pill for 3 years and never missed a day, this past week I missed 2 days and thinking nothing of it I took the days allocated pill, I'm aware that doing so would cause my period to go out of whack. Yesterday I started getting these really weird pains like my uterus is stabbing itself repeatedly from the inside, I went to the toilet and I noticed I had passed a particularly large blood clot, this did worry my but I tried to forget about it, until when I went to the toilet again I was bleeding uncontrollably. I'm not sure whether I should be worried or not I just need some help on this matter?