Think of a chicken run like a prison yard, and the chickens the inmates. You just threw a new solo inmate to the gang in the yard. Chickens must be introduced slowly. All animals, really. Children and adults too I suppose haha.
Will she be okay? Most likely yes, if you get her out of there and put her in a sick pen where you can treat and protect her. Chickens like the color red and will pick at it, being coated in blood will only attract more negative attention.
Pull her out of there, and clean the wound and feathers with a peroxide and warm water mix. If you cannot visualize the wound, trim back some feathers until you are able to do so. If the wound is superficial, you can coat it with blue kote and almost call it a day. If you believe it to be deeper you will need to post clear pictures for further guidance.
Also, remember that a little blood can go a long way in terms of its ability to be smeared and spread to look like it was a lot more than what was actually lost.
Good luck and keep us updated.