Scared to go to doctor

Hi everyone, I lost our third baby this past May. When I found out I was pregnant with her, I never in a million years would have thought we would never meet; I was first blessed with two perfect baby boys whom I had healthy pregnancies. Going from everything being right on track one visit, to two weeks later being the most painful day of my life is one pill I can’t swallow. So because of that, I put off calling the doctor to make an appointment to confirm My current pregnancy. I finally toughened yo and called, at 12 weeks. The appointment is on Wednesday with the dreaded ultra sound. I want to cancel it I am so nervous and sick over it. I feel like I can’t go through that again.