Am I the only one?

I haven't had an ultrasound since I was around 8 weeks when they confirmed pregnancy, and I did get to hear the heartbeat. I won't get another one until 20 weeks, so I have to wait another 6 weeks. I just feel so anxious. I keep having nightmares that I'll go in for an ultrasound, and there won't be a baby. Like I made the whole thing up. I know it's probably just because losing the baby is my worst fear, but I'm just wondering if I'm alone in this paranoid/anxious state or if this is somewhat normal.