Is she involved in sports? My son had this is sophmore year of high school and I was convinced he had serious illness. It turned out to be chondromalacia patella, very common in young teen athletes. Maybe something you can google and research. He had to go to physical therapy but was fine after. He had trouble going up and down stairs at home and school. It is something with the kneecap rubbing.
Lyme, HME, HGE, bartonella. 4 years undiagnosed despite 10 drs.
Current meds: roxythyroxine, bactrim, doryx, amanatadine, neurontin, xanax, valtrex, cymbalta
Prior meds: amoxicillin, probenecid, minocycline, tetracycline, doxy. IV refused by insurance. Supplements: potassium, boluke, alpha lipoic acid, ag immune, magnesium, milk thistle, garlic, grapefruit seed extract, resistant microbes,