I hate to say it but with that blood it's a good chance she ain't gonna make it.
I had an arrow kick off a limb and nail an 8 pter high in the backstrap like that a couple years back. Watched him take off and the arrow flip out about 40 yds away.
Three weeks later another guy on our lease killed him trailing a doe. Buck was on the back of his truck when I asked him to flip it over. Sure enough, pulled back the hair and there was the exit wound, all healed up already. Perfect match to the Rocky Mtn I used back then.
Difference here is that blood tells me you probably clipped the artery running on the bottom of the backbone. If the blood were darker I might think you caught part of the liver also, which is a lethal hit but doesn't finish them for hours.
Alot of times a deer will head back in the direction it came from because it knows that way is "safe". Might try checking water holes,creeks,ponds, etc that direction.
Something else to consider is if the deer is hit high there will be much less blood, especially once they start walking after the initial dash. If they cross a creek or pond it will wash off what little bit is coming out and water it down, making it harder to see. But you can usually keep in a general line of direction and find them. Once they settle down after the initial hit they often maintain a fairly straight course through the woods.
That said, a good deer dog helped my best friend find his 11 pt last year in less than 15 minutes after three guys had searched for 2 hrs for him.
Of course I wasn't there that day.
Good luck on finding her.
This post was edited on 10/9 at 10:13 pm