Sweetie,
Yes technically if your LO takes a good feed from the bad side it will increase how much it produces, but bear in mind your breasts may only increase to their "level" if that makes sense, I can see that one of my sides has a much better blood supply than the other so it makes sense to me that it doesn't produce as much. The thing to remember is that your other side WILL compensate, your body WILL be making enough with both sides together to nourish your baby...I understand this is stressful, I get really worried about my supply all the time but look at your bub, she is active and healthy, yes?
Huge hugs Emma
xx