Been there, instead of talking you out of it thats not what helps. Today I visited with a man who is bedridden has trach, catheter, fed through a tube, no way to say hey I need help, I don't want to live like this. Yet there he is being kept alive by machines. You would be missed. When I get to that place where you are, I try really hard to try saying goodby to my family, it makes me cry, yet it helps.
I will keep you in my prayers as I struggle with this also & it's so painful to be in that place. Try going outside & breathing in some fresh air.