Do you have an emergency psychiatric office in your area? They are less likely to hospitization you and more likely to have AP injectible on hand and write a scrip for APs. There's none where I live now but where I used to live had a psych ER they are less scared of mental disorders. But if you haven't got. One I'd seriously suggest a regular ER, just stay calm don't let them freak you out. Be honest tell em you need an emergency AP and that your going to a group and you do have a pdoc appointment but they rescheduled to the end of January and that's too long for you to go without treatment. Make it clear that the non medicine side is covered by the group you are attending and that all you need is an emergency shot of APs