As Rockport said. Get on your knees. You haven't spent hardly anytime looking for this deer. You may have to hold off on the field until you find this deer, you owe it to the deer, not the field.
Find some kind of flagging tape to mark each and every blood spot you find. Deer usually head for water and think cover after they have been hit. Keep this in mind and start making circles around each blood spot until you find the next one.