Sounds just like a doeI shot a few years back.I zipped her right through the gut, she hunched, ran about 30 yards and stopped to look around. I knew I hit her in the gut so waited until dark and then snuck out until the next morning. When i came back she was laying bedded, dead not75 yards from the shot. The only place there was blood was where she stopped to look around. Does your arrow have a smell or stomach matter feel to it?

If you did gut shoot it, its important that he didnt know you were there or feel pressure otherwise he is gone with little to no blood to follow. If he didnt know you were there, I would wait until morning and come back and he wont be bedded far.