Question about pumping...

Does anyone else have breast pain when pumping? This happened last time and my left breast compensated and made more milk. Its like my boob is super empty, no matter what I do. I can't even pump the whole time because it just starts to ache. No mastitis or clogs... I get 1 oz no matter what and it hurts the whole time. Ive changed flanges, and pumps, even hand expression and tried heat. I ice after... Im going crazy!