Hi, My 5 1/2 month old son was throwing up most of the night. He was a little cranky yesterday, but seemed fine until the night. The strange thing is, when I picked him up at about 3 am (he had woken up and was crying), he smells very strongly of yeast . And then he threw up again and it smelled like yeast. Do I need to try to get an appointment today, or can I wait until Monday?