I am trying to have my 2nd child. My first is 3 years old. Before getting pregnant with her I had 2 miscarriages. They found I had low progesterone and hormone imbalance/ luteal phase defect. I took clomid one month and got pregnant with her. This time I took clomid again and got pregnant. I should be 5 weeks 5 days pregnant. At first my HCG started great but has now started only slowly increasing. Here are my levels:
10dpo-20
12dpo-65
14dpo-185
24dpo-2200
My Dr. was not impressed with my last level and told me to prepare for possibly another miscarriage. We did an U/S with the levels at 2200 and only saw a sac measuring only 5 weeks (was 5w4d), which he also thought we would see more. I go for another U/S in 10 days. Just wanting a 2nd opinion and see if this did sound like a impending miscarriage. Thanks

This won't be the answer you're looking for, but please don't take my or anyone on this websites' advice as medical advice. Doctor's attend years of school and residency before they're allowed to give an opinion. There are medical websites, but you can't be sure that anyone here has the necessary background to give a useful opinion.
If you don't trust your doctor, ask for a referral to another doctor.