S.M.
I always got my blood test pretty early and they would call and say that the levels were elevated but they wanted to retest to establish they were rising. I think they are supposed to double every day for awhile? So, they were cautious and said test was positive and the levels were low and to retest. I think they worry a lot about very early miscarriage - I was like 5 weeks. Sounds like a similar sort of answer. Both times I was pregnant. Good luck.