if you were here in my location (USA) finding someone under a desk like this would result in someone calling 911 and the person taken to the ER for possible inpatient to the mental health unit.

I know that right now it might seen hard to do but only you can help yourself. only you can get your self out from under that desk and either back to work or clocked out to go home. otherwise you run the risk of being committed to a mental health unit... most jobs have standards for unresponsive or violent\suicidal employees now.

maybe you can call a friend who can meet you out in the parking lot of your work place to take you home or to a treatment provider for diagnosing and treating what ever is going on.

maybe you can call your treatment provider and let them know what is going on so that they can come and help you.