A.-
Have you tried taking her to a chiropractor? In my practice, I see many babies who have difficulty breastfeeding on one side, and often there is a structural problem that makes it uncomfortable for them to lay in a certain position and/or difficult to suck in a certain position.
BTW, I am a pregnancy/pediatric chiropractor in Overland Park, as well as a doula and mom-to-be, so I have much experience working with breastfeeding issues. If you have any specific questions, please feel free to write back or call me at my office ###-###-####).
Yours in health-
Dr. Alyssa