HI Cherryblossom, I have everything crossed for you that all will be ok. My hcg levels didnt rise quickly with my last pgcy, seemed to be lower than alot of others around the same stage as myself, however at 3weeks 4days I had a level of 10. I cannot tell you for sure now as my mind is at a blank, but I believe my hcg results were over 100 at 5weeks but not that much over.
I also had a u/s at 6weeks but nothing was seen in the sac, (the sac measured smaller in weeks I think out by a week) I also had spotting on and off for a few weeks at around this time too. I really didnt hold out much hope for my pgcy at the time, yet when I had the u/s the following week there was the HB and also pressing up against the sac was a sub chorionic heamotoma which was causing all the bleeding. I was told that until the baby gets bigger than the bleed that I needed to take it easy JIC. Once the baby is bigger it was considered ok.
I also had the sub chorionic heamotomas with my other DD"s in pgcy too, which I had bled at the beginning.
I do not want to give you any false hope, that everything will be ok for you but I really hope all will turn out ok. However hope and prayers is what could get you thru these next few days/weeks.
Hang in there sweety and try and rest. Please let us know how everything goes, I hope you come back with some good news for us. hugs