HAND FOOT AND MOUTH?

About a week ago my baby was exposed to another child that had hand foot and mouth I was not informed about it until yesterday. And now this is on my 8 month olds hand. It wasn’t there this morning or even an hour ago.

She has been really upset lately but she is cutting two teeth. And woke up yesterday with an ear infection and a sore throat.

I don’t know what I should do or if I should be worried

Update: one hour later and it’s already spread a lot more. Doctors appointment tomorrow.

(Still in the car because we are traveling back home)