K.K.
You really should wait. Are you on progesterone suppositories to keep the levels higher.
The major issue is this....(I DO ULTRASOUND FOR A LIVING). Depending on what your beta HcG levels are, which basically can tell how far along you are, depends on what we see with ultrasound. Our rule of thumb is if the HcG levels are below 1000, we will likely not see anything. Has your doc repeated your HcG blood work. The levels should double every 2 days.
Unfortunately, you are in the waiting game phase. I wish you all the luck....TRY NOT TO STRESS....it is one more stress on the baby too!