Suggest Treatment For Momo Syndrome Despite Being Diagnosed With Strep Throat

My daughter..age 16yrs. Had a strep diagnosis....prescribed amoxicillin..took it..throat cleared..aweek later, went to ER.. thought scarlet fever (rash all over..no strep..no fever) or amoxicillin allergy. Took her off all drugs..two days rushed her back to ER with such pain in her feet..she couldn t walk..admitted for three days..they still don t know whats wrong..discovered she also had momo at time she had strep..???now they suggested neurologist...any ideas?