So I got really depressed after my divorce and I found listening to Jordan Peterson's lectures and controlled self harm to be particularly useful for getting me out of my rut where I was just being catatonic all day not feeling anything.
What you want to do is buy one of these derma rollers with 1mm needles, and whenever you feel numb just put on a Jordan Peterson podcast and rub the derma roller against your skin. It'll create numerous micro puncher wounds, they're harmless but it will make you feel a certain amount of pain so you know you are still alive. Start with your arm and gradually move to more sensitive areas of your body once you adapt to the pain, and let Jordan's voice soothe you while you do it.
Make sure to sanitize the derma roller with rubbing alcohol otherwise you might get an infection. Good luck, hope you can recover from your depression!