Of course you can't. Steam has it locked until 12am PST(3am EST).
Newsflash: the whole world doesn't live in your time zone.
It's unbelievable that some people are so incensed by having to wait just a few extra hours; try actually living in PST when you have to wait those extra hours EVERY TIME something you want to get at midnight comes out... For once, we west coasters get to share in the experience with east coasters rather than have to wait while our friends across the plains are enjoying them... It's not like we get it before you, you just don't get it before us for once. Is that too much for you to sacrifice though? :shakehead:
As for the topic at hand, no, it's absolutely not embarrassing in the slightest. If anything it's more embarrassing for me to walk in in broad daylight, because if I go at midnight, I know anyone else I see is equally stoked to get the game. For a tight game like Fallout, no one will judge you for getting it any time of day, whereas many Nintendo games are a bit awkward for a college student to buy. Like when I bought SoulSilver, I felt like some other shoppers saw what I was buying and gave me furtive, disapproving glances. Not that it bothered me, but I definitely noticed it. I don't expect that to happen with Fallout though, because it's the type of game is directed toward my demographic.
Ultimately, you can't be embarrassed by anything you do unless you allow yourself to believe it's abnormal/inappropriate, and if you care that other people you don't know might judge you for that.