Worrying

I'm a worrier.  I worry about any little thing that could possibly go wrong and I make myself sick with worry about things that do go wrong.  My brother-in-law isn't well and there are so many problems that this will entail that I don't have the brain capacity to take all of them in.  It makes sense to wait until we know what is happening and what will be needed to deal with it but my mind doesn't work that way.  I build different scenarios in my mind and worry about each and every one of them.  Stupid, I know, but many of us are programmed this way and it's very difficult to change your programming..