So I'm full of newbie questions today (despite doing quite a bit of pumping with LO1)!

I switched to a larger flange yesterday morning as I thought the smaller size (which I used throughout my pumping journey with DD) might be rubbing/causing cracked nipples. At first the bigger flange seemed great and didn't notice difference with output- just more comfort. But I have been pumping quite a bit less today and am wondering if it has to do with the flange? I can't figure out which is the better fit based on diagrams I've seen. I feel like I'm really in between sizes. Should I stay with the bigger size? Go back down?

I'm also totally stressing about pumping today which I'm sure doesn't help....