Scared of miscarriage.

Hi everyone 👋

I just found out that I am 4 weeks pregnant. I have been doing some research and I am terrified of miscarrying. (This is my first.) what are the odds of me miscarrying this baby? I am not on any medications, have no health problems, and never have, I do not smoke, I don't have an unhealthy diet. I'm terrified that it's going to happen. What are some signs that I definitely need to look out for, and what do I need to do to prevent this as much as possible?!