My 23 month old had fever for 2 days without cough or sniffles. It cleared by itself. Fed porridge with fish n carrot for the two days. No further development after that. Went back to Childcare on day 3. but she was salivating alot for a week prior. I heard it could be due to teething but it isnt proven. dont't worry too much. If active n still generally happy shld be fine.