Low HCG levels - help!

I'm currently 9w3d. went for my first appt on jan 5 and the nurse said my pregnancy test was faint. She didn't say anything else but sent me to do blood work that day then 4 days later. Well yesterday was my second blood work for HCG levels. They called me today for a 9 am appt tomorrow for a sonogram. :(

I have no cramping, bleeding or abnormal symptoms. I have felt what I assume is my uterus stretching and morning sickness at night on an off. This is so discouraging and none of my friends have kids or are pregnant that I can confide in and none of our families know yet.

Has anyone experienced this ?