Horrible anxiety

I had my ultrasound on Monday and the tech couldn't find baby's stomach from the side only from the front. I have an appointment next month to check again since they think baby was still too small 16 weeks and 2 days. I'm just nervous. And I can't focus on anything. Whenever I try to talk to anyone they say oh you worry to much or don't think about it but how can I not this is my child's health. I hope everything turns out fine but I'm still scared.