My son's homeopathy gave him a remedy for coxsackie's that was very effective. Duh - I can't remember what it was . . . I'll let you know if I can find it.
Hated that disease - my ds was crying for days - he wouldn't even swallow his spit - but he did nurse and it does go away in a few days.
Hang in there - I'll be back if I can find the remedy rx.