H.W.
I don't know about bone scans, but a good remedy to have on hand for any scary situation, especially medical procedures, is Rescue Remedy...if you haven't heard of it, it is a combination of 5 flower essences that is used for emotional trauma, shock & panic...it's really helpful for children, since it is completely safe & has no side effects or interactions with any medications. You can look up flower essences at www.fes.org (the website for the flower essence society--Rescue Remedy is a brand name, & the "fes" product is called "five flower formula") and look up Rescue Remedy (just google it) to get more info. It would probably be helpful for you & your daughter to take it, before the procedure. On the fes site you can even call someone to ask them personally about how it works, safety, etc. Your doctor will likely not know anything about it, but it is a homeopathic remedy.
It does not seem normal that she would be in so much pain about her foot that she would wake up crying, so it's good that you found a dr. that seems to care. Another thing you could try is to buy some St. John's Wort oil (usually vegetable oil, steeped with St. John's Wort flowers) & rub it into her feet daily. This is a traditional herbal remedy for peripheral nerve pain (hand & foot nerve pain) & often gives relief to all kinds of foot pain. It is a beautiful reddish color, & good to buy it fresh from someone local who makes it. I have a friend who makes all sorts of these items, her website is www.holisticbodytherapy.com & her name is Andrea...
hope this helps, in a roundabout way...