scared.

I've been so scared that something will happen to the little alien inside me. I'm scared I'll miss carry soon (currently about 4/5 weeks). Or later like 10, 15, 20 etc. I keep seeing things about people miscarrying later on the app and it panicked me.
It doesn't help that I've been so sick today with food poisoning that untill 5pm today I couldn't keep any food down, was throwing up stomach lining and Bile from 4am to 9/10am. I've managed to keep fluids down and took my vitamins (which I forgot yesterday) but I am so worried. Same with vitamin A. I accidently had something with vitamin A in the other day (a slim fast because it's only thing I could keep down from morning sickness).
I'm trying to make sure I do everything right but I feel like I'm screwing it all up. 
The Drs only say if your cramping and throwing up/craving and bleeding we can see you otherwise I think it's ok. Well that's not helpful, tell me why it's doing this???? Am I/have I hurt my alien?? Is everything ok???
Am I the only one who feels like this?? I feel like I'm going to be scared the entire pregnancy as people keep saying they have late miscarriages or still births etc. So scared 😭
Sorry for the long post I just needed to get it out.