I think if it is Ativan you feel you need and that would solve your issues for right now and there's no thoughts of self harming then your local out of hours doctor would be less time consuming and more helpful to this particular situation.
Not in the US. We don't really give out benzos at the hospital much. It also sounds, from your previous posts which all seem to mention benzos, that you're already getting them. The hospital is going to look at that and nix that because you're already prescribed them. It's more likely they're going to send you home after a really long wait, which is crappy. What else can you do to feel better today?