Does this mean my toddler is lactose intolerant?

Asked by ItalianPrincess1217 (11979) December 18th, 2013 from iPhone

I’ve been noticing my toddler’s tummy gets very bloated and hard after drinking his milk. He also gets gas soon afterwards. He doesn’t usually get diarrhea, in fact it sometimes causes him to be constipated instead. Do any of these symptoms sound like lactose intolerance? We just had to switch his primary dr and can’t get an appointment for a couple weeks. He doesn’t seem to be in pain or bothered by this but I’d still like to have some idea of what’s causing these issues.