Hi Megan Eliz,
So sorry your 13 year old daughter is sick. I used Dr. Jernigan's healing at home protocol and have been totally well for 15 years now. There is a free chapter online and he gives the dosing for children and different ages:
https://lymebook.com/david-jernigan-treatment-of-lyme-disease.htmJust so you're aware there's another protocol.
I wish you and your daughter the best!
Denise