did you try silk soy milk that taste good get vanilla she would like that...and milk cramps my stomach but silk soy mmmm so good...try it.
Yes a visit to the doctor is good, many children cannot take milk , and if she is eating well otherwise I dont think its too important she drinks a lot.of milk .At her age she can be eating most finger foods, with good nutrients in them .There have been many stomach bugs going round this year, has she any fever, is she well other wise ?