My first bit of advice would be to NOT give up unless all of the other aspects of bowhunting aren't appealing to you and to secondly start leaning heavily on someone you know and trust who is an experienced bowhunter...and by experienced, I would say someone who has killed at least a half dozen deer or so with a bow. Having shot in 3D's and at ranges you must know someone. Have them help track the deer the next time and pay attention to every single detail from the time the arrow left the rest until the deer was out of sight. I think there are pieces of the puzzle that you may have missed. Hang in there...good luck.