Ive been cramping slightly today, similiar to menstral cramps, but not as severe. I recently went to the bathroom and noticed a little blood on my tissue about a size smaller than a pea....What is going on here?? I am probably about 4 weeks pregnant. Ive read many articles that have said....bleeding sometimes occur when the uterus is growing to make room for the baby. HEEEELLLLLLPPPPPPPPPPPP!!!!!!