Hi fellow moms

Would like some advise: currently LO is 4 months and 100% on BM

I want to slowly introduce formula to baby. She is currently in daycare and I have to make bottles and send everyday! I want to move to a schedule where we nurse morning n night and give formula during the day! I m scared to change the schedule due to engorgement issues! I currently pump 2 times at work! What’s the easiest way to make this happen without causing too many issues for baby n myself