I do not know, but I think we can try to focus on a loved one's smile... Feel the touch of a loving hand... Taste the ice cream... Hear the gentle rolling of the tide... Smell the flowers ... focus on the perfume of your wife...simple things
You are not alone...
buddy can we see about
getting you some help with the dark cloud and the sleeplessness...I cannot help but think you are in a circle that is feeding off itself...I cannot solve it and I would if I could... but maybe just maybe there might be a way to get it to back off
in the meantime please take care of yourself...please surround yourself in things that bring you comfort (i.e. scent and sound are very important)
I wish you peace, light, and love.