Getting an endoscopy at 18

Hi everyone, I’m getting an endoscopy in May, but every time I think about it I get super nervous. The doctor told me that I would be “heavily sedated” and when I scheduled the appointment today, the lady told me I would need a driver because I would be sedated.

My problem is I don’t really know what “heavily sedated” implies because I’ve never had anything done like this before.

I also really hope this helps because i’ve been miserable with GERD