Hi i think my 2 year old son may have had some rice go down his wind pipe. As i as feeding him he went into a coughing frenzy as if he was choking. Eventually he stopped and continued to eat and drink. The next day he is refusing to eat or drink anything even his own saliva and he is drooling everywhere. Other than that he doesnt seem to have any breathing difficulties and is speaking to us normally and doesnt seem to be in any discomfort. Should i be worried??