HCG Info Needed

southerngrace21

Had my first u/s friday and b/c i don't have regular periods, I am measuring earlier than they expected. We saw what the nurse thought was the heartbeat. My doc tested my hcg levels friday and yesterday. He was looking for the number to double. On monday they were 11,000 and yesterday they were 13,000......so he wants me to have them tested again on thursday.

 My question is this. Could my pregnancy still be viable and healthy even though the numbers didn't double?? The nurse I spoke to say that is very possible. Help I need any information you are able to give! Thank you!