Terrified of surgery tomorrow

Hi, I’m having surgery under general anesthesia tomorrow, and I’m really scared. It’s not just the procedure itself — it’s mostly the anesthesia. I’ve never had it before, and the thought of going under, of being completely vulnerable and not in control and the possibility of something going wrong terrifies me. I know this level of fear might seem irrational, but I honestly don’t think I’ve ever felt this afraid before and can't imagine everything going well.

What’s been hardest is feeling like I don’t really have many people to lean on — actually, there’s only one person who’s truly there for me, despite having friends and family. I guess that’s why I felt the need to get this off my chest and write here.

Thank you for reading and any advice regarding how to cope with this fear (especially as someone who has very strong physical symptoms when being afraid) is greatly appreciated.