That really sucks the only thing you could do is just keep looking !!!!!!!!!!!!!!!! I had something close to that happen a few years ago I hit one a little high and had good blood for about 200 yds , the blood went from walking blood trail to nothing. Couldnt find him that night luckily I went back the next morning and just happened upon him in a briar thicket. You may also look into a blood trailing dog if legal in your state. Good luck to you.