Hi my son started with high temp then a day or so later come out with mouth ulcers and a few spots on his chin which looked like chicken pox when they scab over so I took him back as he was un able to eat doctor gave antibiotics it's day 2 of taking them but his chin don't seem to be getting any better any ideas of what this could be age 2 he has started to try and eat now he managed 2 hotdogs as these were soft with out the roll but still has the ulcers in side the mouth and these 4 spots on his chin that don't seen to be going ??