Has anyone's LO had Scarlet Fever before? Or do you know someone who has?

DS#2, aged 15 months, was diagnosed with a strep, double ear infection, and a possible allergy to amoxicillin last night at urgent car. He has a rash on his face, torso, bottom of his feet, palms of his hand. The nurse practitioner at the pediatrician's thought he had hand foot mouth, but the rash on his face isn't that bad (we were there for DS#1 so she didn't really look at DS#2). So my parents (oh my gosh I'm long winded) said maybe scarlet fever. Well, scarlet fever is in the strep family and his face looks more like scarlet fever..... So, has anyone had this?