Sometimes when stomach shot the stomach or intenstines come out and plug up the hole which results in not much blood on the ground. If you had hit the liver the arrow should have had thick red blood on it. Sounds like you might have hit the liver if the blood you found was bright red and thick.

Don't know what to say, my gut feeling after reading this is the deer will expire, but ya never know.

I always wait a long time, even overnight, when I see green stuff on the arrows.