Vent away here if it helps. If the negative thoughts end up on your computer screen and STAY THERE then that's good. I believe that to be the case, because you always seem to have the off-key remark that makes us all smile.
You are under a heavy load, and need to just do one thing at a time for a while. Don't look ahead, don't look behind. Take care of right now, and let the rest handle itself.