Is this normal?

4 weeks postpartum. 15 min pumping session. Babys gained weight well. Baby’s been cluster feeding like crazy. She nursed off of one side right before this pumping session (the empty side). And the other side she fed off of probably an hour before, but it didn’t seem like a full feeding, she fell asleep early on that side. But she has been feeding very regularly off of both sides so it wasn’t too long before that she nursed

But is this a normal amount to pump 4 weeks pp considering the above? Just surprised to get nothing out of one side. I know baby just nursed, but not even a drop out of that side? I’m using 27 flanges but my nipples maybe have gotten bigger even since having baby. I’ve met with lactation consultants first 2 weeks pp, they agreed 27 was my flange size (was with my first too). I also was producing a good amount of milk, a little more than average at that stage so was thinking must be a pump issue, if there is one. Not milk issue. Do you think this is normal or wrong flange size or something?