Congrats on your first deer, but you do not have your first deer at this point. What color was the blood? was it dark or bright red? was it gritty (Gut Shot)? did it cover the entire arrow? I've had deer travel 50 yds with no blood before. It is possible that you hit an area that will let the deer survive but it sounds like probebly a pass through and my guess is it is not far from where you hit it, within 100 yds.