you should have hit something.. I would suggest going back today and looking the area over again. Pay attention to near by water, and cover and deer escape trails. Also, pay attentions to voltures. I have found deer by watching the birds. sometimes the birds find em before you can even get out of the stand.

make slow moving circles from you last blood, id give it a good looking over before you give up, if you have a friend that can help or know someone with a tracking dog its better then doing it alone.

Good luck, keep us posted.