This may cause constipation, regurgitation and heartburn, and it may take longer to digest a meal. Perhaps what you are interpreting as a lactose intolerance is merely a result of this. If you have always enjoyed plenty of dairy products in the past, I feel sure you will be able to enjoy them again after your pregnancy. What may work for you now is to reduce the amount of dairy that you eat at one time. For example, instead of a whole glass of milk, have only a half glass.
Some dairy products are better tolerated than others.
For example, yogurt, whose lactose is already partially digested by the cultured bacteria, may be easier for you to digest. Fat will take longer to digest, so stick to low fat cheeses and dairy products. Make your milk, skim milk and your cottage cheese and hard cheeses the no-fat or low fat variety. If you continue to have problems, it would be fine for you to drink lactose reduced milk, or to take Lactaid tablets, to see if that will help your problem. Thank you for writing.