Hi. My Baby Girl Is 1 Month And 20 Days,

Hi. My baby girl is 1 month and 20 days, she has Lactogen 1 formula milk. We don't have any issue with this formula milk except regurgitate after feeding. Sometimes she regurgitates 5ml sometimes 15-20ml. I try to hold her on my shoulder after feeding for belching air out but even after that she still regurgitates. I am so confused. She has stool 1 times in a day, she was born 3kg, now she is 6kg. Should I change Lactogen to some other anti-regurgitate infant formula milk? Your advices will be very appreciated. Thanks.