My HCG took 62 hours to double and I was a nervous wreck - nurses told me it could go either way and to be prepared for miscarriage. Well now I'm 23 weeks pregnant and everything is fine! Turns out I had a small gestational sac which resulted in the lower hcg. (Another thing I was made to worry about for weeks, but turned out fine). I wanted to post this now because I'm pretty sure I read every article that exists on the Internet when this was happening to me and finding these hopeful stories made such a difference. So don't lose hope, ladies!