I went through a right ‘mare mentally, but the way I fuddle through life is to just accept problems outside of your control, go through the various stages of denial/acceptance and eventually you’ll pop out the other side.
I am me though, and we’re all a bit different. For example poor, slightly retarded tiddles, I considered (but nothing more than a fleeting thought) having put to sleep.
When I think about it, that was pretty screwed up for a normal thinking person, so try not to make any big decisions for a while is my advice!
(I managed to re-homed the lucky bastard, into some sort of mansion)