new job stuff

i started my first real job last week and i feel like a total imposter all the time. everyone else seems so confident and knows everything about the company stuff but i barely know where the restroom is. my boss says hi to me every day and it makes my palms sweat, i dont want her to think i'm incompetent or something. do other people really not have these same thoughts? am i just overthinking this? anyone else deal with imposter syndrome like this?