Go home and breath. Don't be walking around the place. You ain't helping at this point, doing more harm actually.
Maybe stop by the store and grab some markers tape/ribbon. So you can mark the trail when you do pick it up. Make sure you have everything you need to get the deer out. Lights, batteries, sharp knife, rope, ext... smoke a green one, do what you have to to get out of your head. Like Chuck said, you have plenty of time. Job is done, just gotta find it now.