What Duck said. You *know* the source of these emotions. It's not sanity you are lacking; these are normal, healthy responses to biological and emotional conditions. You don't need to try to do anythign social or anything you don't want to do... you do need to watch the cycles of your thoughts and have the right phone numbers if they go too far into the darkness.
Bicycles and chocolate and movies are good... This Too Shall Pass from darkness into light.