Lactose baby

Hi all

My LO was diagnosed with lactose intolerance. We are currently giving her colief drops with every feed through a bottle feed with my expressed milk to help break down the lactose in her body but it’s making her spit up a lot more than she should.

Is there any other options that are great for a lactose intolerant baby besides formula? I’ll be sad to give up giving her breastmilk :(