You don't have anything to worry about. A matter a fact. (I'm 19 years old right now) I picked up bow hunting when I was about 14 or so, and I had a pretty nice 10 pointer come up on me one evening and I took a shot, but I shot right below him (very disapointing), anyway I went back the next weekend and saw him in almost the exact same spot at the exact same minute. Very weird. Two Saturday's in a row at 6:24 pm I shot at that deer and missed both times, I learned a valuable lesson then and I actually haven't missed a deer since!
They will be back.