I am currently 16 weeks pregnant, about 2 weeks ago i had a bleed which was initially quite a bit and red in colour, i went to emergency, they did a ultrasound and the baby was fine with a good heartbeat etc.. the red turned to brown and lasted a week. it went away and now came back, still brown, but very thick and clotty, no pain, just wondering what could be causing it and how long may it last?