I know the feeling weary
When things start to overwhelm me I think of how better off I am than others too, sometimes it puts things into perspective for me. I call it my 'why me, then why not me day'. I really cant think of anyone I would wish my bad health on (although there are some days when someone annoys me I could quite easily give it to them )
Its good to talk on here to people who understand what you are experiencing.