Steve. you gave some good indicators, but...can we discuss more. You said you hit a bit high behind the shoulder. First. describe "the shoulder" Are you talking the actual shoulder blade, which is far forward and high on a deer, or that thing near the bottom line of the deer(elbow on us) that everyone is taught to aim behind and call the shoulder ? It matters. You said you hit high. If the deer was looking at you as you shot, it is a good chance that he was already moving time the arrow reached him... AND that whirl of movement can stop the pennetration of the arrow as well as any bone.
To me, I am guessing that you hit behind the "elbow" and if you hit more than just a few inches behind this point, you stand a good chance of not hitting lungs but getting liver. Dark blood tends to confirm this hit.
I really think that we as bowhunters need to start looking at re-arranging our thoughts on that "spot" to pick for aiming...but that is another topic.
If you got the liver, the odds are real good the deer is dead, but not in ten seconds like a lung shot may give.
learn to take a compass reading of the deer's line of movement as you watch him or her leave. Use it as a last resort, but very often that reading will save the day.
I have learned a valuable lesson in hunting...the hard way. If you see or hear the deer fall....you can go get them most any time. If you don't....give them 30 - 60 minutes...more if you are concerned about a bad shot.
If you sneak out, the deer is likely to run less than 100 yards and stop to look back, then bed, then die. IF you are after it before it beds, it will continue to run. If you get close enough after it beds and it is still alive, it will probably get up and move off.
I would wait till morning so you can see better and so you don't push that deer further.
Most unpushed deer will travel fairly straight. Yes, they may circle..trying to find out what it was that scared em. But they will not weave in and out. a pushed deer WILL do that, especially in a swamp or marsh.
Go get the guy in the morning...good luck
ChuckC