Anxiety about baby’s health

I’m a FTM and I’ll be 13 weeks pregnant Monday. My last prenatal appointment was cancelled by the doctor, but I was gonna ask her about me not taking vitamins because they make me so much more nauseous. But they rescheduled with a new doctor for the 8th.

I’m scared that my baby isn’t healthy. That she/he isn’t growing right. That it’ll have some form of a birth defect or something. What can I do to calm this anxiety? I’m naturally an anxious person because of mental health issues that I’m dealing with but this is the only thing that’s concerning me at the moment.