A question for moms who have lactose intolerant children?

It's typically not "lactose intolerance", more like a milk protein allergy. They don't typically test until they are 1 (they do the test with the 1 year-old blood work). Talk to your doctor again, and in the meantime, avoid cow's milk based formulas. There are plenty of things the MD can prescribe that would help your child. Good Luck!