Champion nurser! Hang in there. Give her more time on the same side so she will get more of the hind milk which is thicker and heavier.
Do you also know how to nurse lying down? This is helpful so you can rest while she is busy nursing. Read Night Time Parenting by Dr Sears or go to AskDrSears.com. Both are helpful and know that it is normal for babies to nurse a lot! Tummies at this age are the size of a golf ball and they are very efficient at digesting mommy milk, because it is so bio-available and healthier than anything on the planet. Your milk will change with her needs. Just make sure you are drinking plenty of fluids and eating well to nourish yourself.
I would hook up with your local La Leche League, just google them and they can help you with any of your nursing goals.
Good luck and enjoy, for this is a fleeting era!
The days are long, but the years are short.
J.