i know from experience that having difficulty making decisions, even when you have enough information and an actual opinion, can be a symptom of TBI. also, you might consider the effects of PTSD, which can be from continual stressors and small traumas, not only from a single incident.

personally, i would go look at the hospital before entering it as a patient, meet the doc on staff who would be making decisions for you (), and generally ease into the situation or out of it.

also, there is a forum for MI hospitalizations, in the "Treatment and Self Care" forum, where your post would be seen by people with actual experiences.
best wishes~