Lol are you sure you weren't the one who squeaked? I don't think snakes squeak..

Don't worry about stressing the snake out. Taking him out to weigh him isn't going to scar him for life. We all cheat and handle new snakes when we know we shouldn't. Just try and resist. Once he starts eating for you you can handle whenever you want really. Aside from around feeding time and a day or two after.

I think you are getting the new-snake-parent-worries. Don't worry. its completely normal! Try to relax!