suga!
I don't know. Kind of sounds like one of those nights where a combination of little things got to you more than it usually might (had one myself, just last night). Wouldn't see any reason to think of it as psychosis. Though being drunk might not have caused, it probably didn't help. Aside from the whole depressant thing, sometimes, especially when no one else is around, it can give us too much time to be inside our own heads and when that is already negatively primed (lonely, under the weather, still tired after stressful long day etc)... yeah.
I dunno, that'd put me in a not-so-great and not terribly stabilized feeling place (!)
Hope you are feeling better soon!