I am not surprised it gets worse as the days go by. First you must have been in shock and disbelief. Now as days go on reality is setting in. Try and return to work even if you don't function as well as normal.

Be kind to yourself and do something, anything, you like every day.

I am so sorry this has happened to you. Can't imagine how his parents feel. You need to force yourself to live as normally as possible until you are back to normal life for you.