Turning up pump

Any pumping moms ever have issues with one side not draining as well? My left side is lagging behind my right. I have to turn the pump up quite a bit and it’s starting to make my right side hurt. My left side makes more than my right so I’m pumping for like 25 mins because it takes 10 minutes for my left to even start draining and my right side is done by 15 minutes. I don’t know what randomly changed but it hurts.