Breast pump for small chested women

Hi all! I changed insurance for this baby and unfortunately it doesn’t cover the free breast pump so I’m else inclined to experiment as I am paying out-of-pocket. I am a 34 A even during and after pregnancy, I am looking to see if there is a breast pump that works especially well for small breasts! I know they come with different flange sizes but I had the Medela with my first and it didn’t seem to grab enough milk. TIA