Mama we had the same deal. My little one's mouth was just too small to accommodate my gigantor breasts.
It did kill us for about 5 weeks - but about at week 6 the pain finally went away. When it went away it was just - poof - gone. In the meantime I used Neosporin Pain on my nipples when I knew it'd be a few hours until she nursed again. Just be sure and gently wipe that off because it does have medicine in it that you do not want your little one to ingest.
Hang in there! It will get better. I *promise*.