The headache could possibly be related to the hair dye...since she applied it twice...you were exposed to the fumes longer. when i get my hair colored, the smell bothers me and i sometimes get a headache as well. try ibprofen is you havent already , sometimes alternating between tylenol and ibprofen every 4-6 hours helps. Not sure if the sore throat is related.
Chronic Daily Headaches/Migraines
Meds-Keppra 1000mg/day, Calcium with Magnesium 1000mg/day, Vitamin B2 200mg/day, Imitrex, Relpax, Maxalt