So I got a positive HPT but when I went to my primary Dr. his test was negative. We did a blood test on mon 3/11 and my HCG was only 18. We did a second one on fri 3/13 and it only rose up to 23. My Dr. said he is worried that I might miscarry because the numbers are low and didn’t double. He wants me to do an ultrasound tomorrow and then one a week later. But aren’t my levels too low to even see anything on an ultrasound? Has anyone had this happen to them? Has anyone had an ultrasound with levels this low and actually been able to see something?