Scared I’ll hurt my baby

I don’t eat much before I was pregnant I was 107 lbs. now I’m 102. I never ate much before I was pregnant very unhealthy diet but now I seem to barely be able to eat. I’m so scared that it’s going to affect my baby. I just feel like I already lost it but I haven’t. My mom had 3-4 miscarriages before me and my brother. I’m just so scared I will too. I just need to go to my ultrasound so I know my baby’s okay. ( if there was a “extra panic for no reason pregnancy” group I’d put it in that sorry if this is the wrong group)