I have recently been diagnosed with PTSD after I was involved in a car accident five months ago.  It has taken all that time to develop into a stage where I need counselling.  For two and a half months I carried on not really knowing there was a problem.  Yes, I was sad, yes, I thought about the event everyday and dependent on how busy and what I was concentrating on it waxed and waned.  It did not really get in the way until the natural pressure of work on a new project built up and new managers came on the scene.