for the feet bieng cold, please wrap with a warm woollen socks, check the childs temperature readings every 6 hrs once, should not cross > 99 F. the child may be cranky because of fever
or because of aerophagy( swallowing air causing stomach discomfort
), do not bottle feed the child in sleeping position as it may cause middle ear infection
so please check for ear pain
,check the childs oral cavity for any ulcers, if u dont find any satisfying results by yourselves, contact the doctor for a detailed checkup.