J.S.
Sydne,
I had the exact same problem. You need to get her nursing on that side if at all possible. She may not like it because the letdown isn't as fast on that side, so you might try starting her on the right, just until you get a letdown and she gets a bit, then switch her. You can try just sliding her over (so she's still laying in the same position). Anyway, I would nurse/pump as much as you can on that side to stimulate the milk production. Don't ignore the right though. You may not get them to be exactly even (mine still aren't), but you can probably make it much less noticable. It is actually normal to have slightly different sizes.