We got referred to a doctor for suspected HFM when a child at Milo's creche had it. Milo didn't, but the doctor said that he had seen a lot and that if it was HFM he should have a lot within 4-6 hours, and that it would be quite obvious that thats what it was?

I would go and see someone if you suspect you've been exposed, JIC its something they need to get on to early IYKWIM?