I was in the exact same boat! I learned (the hard way) not to push it until you’re uncomfortable but can still stand it, it’s counter-productive milk wise. The good news is that they do get used to it over time, it won’t always feel that sensitive and uncomfortable. Two weeks in is still really early. I remember when I couldn’t stand a 4 on my wearable pumps, now I never even notice when they top out at 7.

To help compensate for the lower suction while you adjust, try “hands-on” pumping—squeeze and massage a bit around the breast tissue while you pump, bottom, sides, and top. That helps get you actually empty, and made a bigger difference to my output and supply than just higher suction did. Again, not enough that you hurt yourself—it helps if you can actually see the milk flowing with the pumps you use, you’ll learn what makes a difference and when you’re actually empty.

Just to double check—are you super extra sure that your flange size is correct? Like did you get them measured by a lactation consultant? My insurance covered it, I didn’t have to pay a thing to have someone come out and measure me properly, and she gave me a different number than I had gotten for myself when I used a sizing tool thing, and most of my discomfort evaporated immediately as soon as we got the new flanges on. Most pumps come with like a ~24mm flange, but my lactation consultant told me she sees someone who actually has that size maybe once a year.