Poor baby! Ouchie!
Take your little sweetie and wrap her firmly in a towel so that you can reach her toe without her stopping you. You may want to make it a two person job. If you don't have any dog clippers, use clean human toenail clippers or blunt small shears. Clip the nail that is hanging off, but try not to clip it any further towards the toe. It may bleed a little bit. If your hubby has a stiptic pencil, that will work to stop the bleeding. If not, use a little flour, that will make it stop enough for the blood to clot and stop. Wipe it down when it stops bleeding, and use a little neosporin on the boo boo. Just a little bit, you don't want her to lick it off.
Good luck!
Give her puppy kisses from me!