My 21 week old had croup after the new year, not seriously but enough to warrant a spacer and inhaler which I reluctantly used a few times. Since then he has been quite sicky following bottles, and actually is being sick quite a while after food. He has always been a sicky baby and isnt in any way distressed by it but now the sick is very very mucousy - but clear - so don't think its infected, should I just leave it or go back to docs?