Hi, I went to the doctor on monday and they took my hormone levels, it was 91. I was 5w2d. They told me this was low. They also did an ultra sound and they saw a yolk sac, but no fetal pole. I am getting another ultrasound done in a week. Two days later, wednesday, I got more blood work done, they expected my HCG level to double, but it is only at 135. Is this normal?? should I be worried? they told me its a 50/50 chance to be a successful pregnancy and I have to wait to see what the ultrasound shows in a week but I cant wait that long!!