Why Did The Midwife Cut The Right Side Labia Minora And Sew It To The Left Side?

Hi. I was online trying t find answers as to why after giving birth, my midwife cut my labia minora on the right side and took it off and sewed it to the left one and it is a lot bigger and uncomfortable now and not straight anymore and I have hardly any flap on the right now at all. I just don't understand how that has anything to do with me giving birth??? I am 24 years old, 5"3, and have always been in good health.