Confused. Devastated.

Yesterday I had my first ultrasound at 6 weeks 5 days. They saw the baby. Heartbeat and all. I got a vaginal ultrasound. About an hour after I started having light spotting. Specs of brown when I wiped. It went away by the time I went to sleep. Went to the dr this am to be reassured. He felt it was from the U/S And sent me home. When I got home bleeding went from brown to dark clotted red blood. Like a period. And I'm still now bleeding after laying and resting all day. I called them again and they tried to tell me they still weren't worried at this point. But to go to the er if it continues into tomorrow. Please ladies. Tell me your stories. Has this happened to you? For how long. And what was the outcome. This will be probably my 4th post of the week. I got such good news yesterday and now this. Anything is appreciated. My husband for whatever reason isn't being very supportive at the moment.