Get back in there and go to the last place you saw here at. Start walking trails and making circles around that last spot looking for blood. If all else fails just start walking the trails in all the different directions looking for a down deer. Dont get down about it, as everyone has stated that happens to everybody. The only way to make yourself feel any better about it would be to get out there and do all you can to find it. If you dont find it after trying as hard as you can there is a good chance she lived and you may get another pop at her next year. Good luck