I think I'm gonna miscarry

Sandra
I came to the hospital because I started spotting this morning. The ultrasound really didn't show anything. Here's what the dr said
​ He said my urine test was neg but my blood test is positive at 44. He said I could just be very early and that he thinks I would have miscarried already if I was going to. I have to call my dr and get another blood test sometime this week and follow up with another ultrasound. I should be 7 weeks though and my hcg should be higher. He said nothing is matching up: neg urine test but positive blood test.