Flange help

Brie

What do you think about the sizing.

Around my nipple/areola junction is pretty sore. My nipples burn & get larger after pumping.

I prefer breast feeding but I'm building my supply for when I return to work.

These are 24's the hospital also gave me a 27. I think because I have H cup breasts they gave me a larger set of flanges. Should I stick with the 24's or try 21's?