Oh, yes, too much Tylenol! Research is now showing that taking anything over 325 mg for a dose doesn't decrease the pain any more. And liver problems are a major, major concern.
I am wondering what to suggest, since you said you are thinking the goal is to make you feel BAD! Honestly, if need be, then start with a new therapist with this issue as your presenting concern. You won't be hospitalized unless you are potentially a danger to yourself or others. And you certainly aren't being nice to yourself. There are other mental wards/hospitals, I assume, if need be. Some are better than others. The concern is to get you well! Okay?