feeding my baby is painful but latch appears fine, my are huge - thumb sized, help. :C?

ive heard peopele say noo cant be too big theyre smaller than bottle ... mine ARENT. think soda bottle cap diameter. My baby latches on steadily, her lower lip is out like it should be, but its painful... very painful. she left little sores on both areolas before i gave up and started pumping. i still try her on the every day and she doesnt protest but it still hurts. I think she cant get enough of the areola in her mouth comfortably so her poor little hyper extended jaws are rubbing the sore spots on me from her gums... does anyone have any idea what I can do besides wait for her to grow? multiple night feedings and pumping are killing me and i keep falling asleep and not finishing pumping and im worried my milk supply is dwindling.