I'm 7 weeks along and this morning felt a gush of blood come from me. I went to the bathroom and passed a large piece of tissue or clot. It looks like a sac but I can't see a fetus inside but what looks like blood vesells running through. Sorry for tmi. I now just have brown spotting. I am scheduled for an emergency ultrasound tomorrow. Has anyone else experienced a miscarriage passing this quickly without pain?