Absolutely you have to report them, send your photos you took with your wife, boarding pass.... , they should know that you have visited your wife, I decided to go because of this to report them that I come and visit my wife, they will not ask you from your visit.
About your wife, so u didn't pass second re-medical yet, in my opinion every changes comes to your status let them know, whether they will take action or not at least you inform them , in the future they will not say that you didn't inform us. BUT I am not pretty sure you have to ask these guys in forum, they have more experiences; by the way your wife is in Pakistan or Afghanistan?