Hi. I'm sorry you're going through this. I can relate. Sometimes when I want to hide, I stop fighting it and actually do it...last night at 5 PM, I gave in...crawled under the blankets, curled up and went to sleep. Sometimes we're just so overwhelmed that fighting off the overwhelm just makes us even more overwhelmed. Today I got feeling this way intensely...and I am at work. I am lucky in that I can come and go as I please...so I drove somewhere, parked, and did a 10 minute meditation. It was enough for the moment.
On the desire to hurt yourself, go for distraction of any sort. Acknowledge the desire and be compassionate with yourself...you're in a lot of pain if you want to hurt yourself...and then do something else. Preferably physical (I find that when I'm in that mode, I have to move...reading, listening to music, writing, etc. doesn't do much to ease the compulsion to self-harm). Washing dishes, folding laundry, organizing cabinets, weeding, sweeping...all work for a while. Sometimes I have to keep finding things for myself to do until the compulsion passes. And it does, eventually. Maybe if you go to the beach, you can build a sand castle with your wife.
Keep breathing. Be in your body in the present as much as you can. Let yourself feel kind and gentle things about yourself. Peace.