How likely is a miscarriage?

Hey ladies, I found out recently that me and my boyfriend are gonna be PARENTS! I quit smoking as soon as I found out, I had quit drinking before that, and I'm taking prenatal vitamins that have everything the baby needs. I'm estimating I'm between 4-6 weeks. I'm not feeling anything that I think is abnormal, no terrible pains and no bleeding whatsoever.

There's one thing I'm nervous about: losing the baby. I just need someone to ease my mind about it. I know that our little one is here to stay, but part of me is still terrified. Any mom's out there have some advice on how to not worry about it? Or anyone know the actual likelihood of a miscarriage? I just need new mom advice 😭❤ thanks in advance!