Producing on one but not the other?

Okay so I feel like my right breast produces & my left breast doesn't. My daughter will eat on my right breast & seem satisfied but when I put her on my left, she sucks for a second then pulls away & cries. I try to sit & pump for atleast 10/15 minutes on each but even then, my right breast will produce 1 ounce all on its own & my left won't give out much more than  a few drops or so. Anyone else have this problem? Any idea what I can do about it?