Wayne, sorry to hear about Val, how is she getting on now?
I know your ability in first aid, having a FAK with you would of not made much difference and it could have made things mush worse by giving you the confidence to rap her up and move her to the road.
You did the right thing mate, you assessed the injury, took into account of shock, made her comfortable and warm as possible. Summoned help and collected the ambulance personnel. There is nothing more you could have done.
Your post last night was written with anxiety and shock, if you needed a chat you would have been welcome to have phoned. How are you now?