Being admitted to a clinic?

I have been seeing a clinical psychologist for a couple of months now. A few weeks back I attempted suicide, but this came out in therapy only last week. My suicidal tendencies tend to be more impulsive than planned out. My therapist immediately referred me to a psychiatrist who evaluated me, and changed my medication also last week, although the attempt was a couple of weeks ago. She suggested that I should keep hospitalization open as an option. When do I know it has come to the point that I require in-patient treatment. I understand that I may not be thinking objectively, but the suicidal thoughts have lessend to the extent that I feel that I have more control over them. Affect is also better. But sleeping and eating patterns have worsend. At this stage admittance to the clinic is voluntary, but how do I know that this is the right choice at this point in time?