It's not your imagination

There is a reasonable chance that she is legitimately crazy by medical standards:

More than one in four American women took at least one drug for conditions like anxiety and depression last year, according to an analysis of prescription data. The report, by pharmacy benefits manager Medco Health Solutions Inc, found the use of drugs for psychiatric and behavioral disorders in all adults rose 22per cent from 2001.

I recommend staying away, very far away, from any woman who is in therapy, or who is on any sort of prescription for psychiatric or behavioral disorders. It's difficult enough out there in the current legal regime and there is no sense adding a degree of difficulty to your situation. No one is going to award you any extra points for attempting to manage crazy.