First off, if I had a known gut shot (did you know that by your arrow or arrow impact?), a "couple hours" as you said it IS NOT ENOUGH TIME to wait before you head out to look for a gut shot deer. You should have waited a minimum of 5 to 6 hours and 8 if feasible or overnight. The Rage does tremendous damage so perhaps time would be minimized however " a couple hours" wasn't it.
Now that being said, if you KNOW you can get close enough, I wouldn't hesitate to do just that and finish her. It's the right thing to do regardless of what the law says. And now for some interesting reading if you haven't ever read it:
http://www.huntingnet.com/forum/tm.aspx?m=2272257