Gestational Sac, Yolk Sac, but LOW hcg

LochnessHolly

So, my husband took me to the ER last night for severe abdominal pains, and while they were doing all the tests, the doctor got impatient and just went ahead with the ultrasound. He said I had the cyst on one ovary (that I guess you're supposed to have) and the gestational sac with the yolk sac, so he confirmed I was pregnant.

But when the blood test came back, it said my hcg lows were too low to be pregnant.

Um, what? You just saw my growing baby, and now I'm not pregnant? O_O Plus, i got a positive on the urine test...

I've always had low hcg levels (like, not until 4-6 months in did I get a positive test at the doctor with my other pregnancies) so I'm wondering if anyone has experienced the same? My husband is trying to convince me the baby could still come out perfectly healthy...but I'm just so lost right now. Any advice is appreciated.