Was she broadside, quartering away, to? Were you in a tree, on the ground? Find the arrow. Sounds like a muscle hit to me. There will be bits of muscle on the arrow if it were, in which case you may have only got one lung, or no lung depending on where you really hit the deer. It's tough sometimes to see exactly where the arrow went. Like dkbs said, if it were a complete loin or muscle hit, you will never find that deer. If it was one lung, the deer will go down, eventually. I'd say the doe you saw being chased by a buck wasn't your deer so I'd find trails near last blood and follow. Deer will often take an easy, familiar route when hit that will lead them to heavy cover or water. Check thickets and whatnot. Good luck, hope you find her.