If she actually cared about you her first thought if she thought you had some kind of psychotic break would be for your health, not questioning your relationship. I'm not it's never justified to break up with somebody because their mental health issues are getting in the way of your relationship, but if the relationship was otherwise going well that should be more significant decision than you can have in the morning after a weird night out.

Also some of these comments are making me think I might've been drugged in the past and assumed I'd drank more than I thought I did.