Hi
I had the same problem. I was given a shot of Beta HCG twice in a week till 20 weeks. My doc said it was due to low level of hormones. Good Luck, check with your doc.
Hi - technically for a 'viable' pregnancy the numbers should double every 48-72 hours, depending on how far along you are. That said, my numbers didn't double and i was told to expect to miscarry, but i didn't! So, things might not always be textbook - try not to worry about it and stay positive, its good that they're increasing.