valentina31183 on "Beta # too low?"

Hi,
I'm not sure if I'm asking this question in the right spot. But I was wondering if anyone had any info. on very low beta numbers. To give some background info., I'm 15dpo, 9dpt. I had a FET and had 2, 6day embryos transferred. Hcg level came back at 2.3 today. Nurse says they caution patients against being optimistic with levels this low. (Duh) But that they consider me to be pregnant right now since anything over 2 is considered a positive. Repeat beta is Monday. I have had light, brown, spotting off and on for the last two days along with cramps. I'm on PIO injections so it's not AF. I'm wondering/hoping, could I have had late implantation which would help to explain the really low number? Has anyone ever heard of someone getting a number this low and going on to have viable pregnancy? Thanks for any help you can give me. Trying not to lose my mind.