burning eyes and severe headache

I have an 8 nyr old boy who has allergies he went to the zoo ona field trip and ot has been down hill from Monday. He has puffy eyes and a headache. Benadryl given and slept three hours. Went to school the next day home after 45 min with a severe headache and eyes burning. Back to dr and now has R ear infection on amox. and pataday for eyes. Wednes no school head hurts Thursday now dizzy and less severe headache. What do I do?