Threatened miscarriage

Anyone have bleeding in the first few weeks and the pregnancy carried to term? I had a gush of blood last night and about two hours of light period looking bleeding and I am 5 weeks. Went to the OB this morning, the bleeding has spotted and he saw the yolk sack but was 95% sure i would start bleeding again and miscarry. He took my hcg levels today and I got back Sunday. Anyone else have this with a positive result?

Update: I had bleeding for two hours then it stopped. Hcg on Friday was 4063, the lab is closed today so I go back tomorrow to see where my levels are.

Update 2: no bleeding since Thursday night. My levels went to 9,942. My OB says he will see me in about 3 weeks and that it looks okay.