Not sure what I did it flip the lopsidedness. I can only pump .3 oz from the left side now. Baby nurses shorter on the left before coming off but I put him back on and do compressions. I used to pump 2oz from the left, 1/2oz on the right. Now the right side I get almost 2 oz. I sometime offer left first sometimes right.
I didn't notice a gradual change, more like it flipped overnight. It's been this way for a couple of weeks now.