It is completely normal to feel “incompetent” from time to time, maybe even your coworkers feel like that at this very moment.

It is definitely tricky to approach your coworkers for help/tips, there are some selfish assholes out there unfortunely but there are also a lot of selfless people. Try approaching one of the most experienced first, or maybe someone new that might also be struggling.

Keeping these feelings to yourself will only make the problem worse, you will start being paranoic and start thinking that youre gonna get fired every time you get an email/call from your boss.