What I do when I blow it

A question that was posted on a support site I follow talked about how hard it can be to have patience with an Autistic child who just can't seem to get it or is intent on trying you and pushing your buttons on a given day or in a given situation.  The question was what shoud one do

The star

Today we were supposed to be going to David’s final Autism evaluation where we would get more specifics and also answers and connections for getting some help with all this. I’m very tired today and both physically and emotionally worn out. Last night/evening was a hard one... One of the hardest I have had to face in the last few weeks, and definitely one of the hardest overall that deal with David and his struggles that Autism throws into his life. I already wrote about it in another post that I copied from a letter I wrote to a friend afterwards so I won’t repeat the story here.