low hcg

Laura
I had two back to back miscarriages, followed by 9 months of TTC, and finally found out i am pregnant about 3 days ago. 
Went in for blood work to confirm, hcg levels were only 31. I was probably around 14 dpo.
I am just so defeated. I can't do this again. I know that everyone says that it's the 2nd draw that matters and it's doubling, but this is just too much. 
I keep taking HPTs and they don't get any darker. I can't help but just think this is another miscarriage. 
Anyone experience success after a similar situation?