Them Dam no seeums, when you been doing it as long as we have one of them is bound to get ya, I dont care how careful you are!
Had one get me a few years ago, never seen it till after the shot, I almost threw up when I seen the arrow sticking out of the bucks hip as he ran around my tree, Luckily it caught the big artery and he was stiff as a board when I found him right where I seen him last.
Good luck in the morning, if he is dead, Im sure you will find him!