"the Dr didn't spot my babies mouth ulcers "

came in with my baby who had really high temp and mouth ulcers, and stooped eating as he was to afraid. I called the surgery and a really nice receptionist offered me an appointment straight away, i came in and this is were it went down hill, the dr didn't even check his mouth properly she said its all clear, and even opening the door for us to leave. later i had to attend emergency service were i was told he has really bad mouth ulcers!!! y didn't the dr see this at the first place??