Good news vet says that the blood is doing exactly what it should be doing draining away downwards. So looks like was most likely a bump she suffered and not something more serious.Just got to keep an eye on her to check it all clears slowly. She has been allowed to go back with her siblings so that will cheer her up
Just need to find a lovely new home for her and the other 9 foster kittens and one mummy i have in at the moment
Thanks for all the well wishes.