Hey, I see you have already had a lot of really great responses here, but I thought what the heck, I'll give it a shot.
First, if you are putting her on both breasts at every feeding time, try this instead: feed her on one breast at one feeding, then the other breast at the next feeding. Don't worry, your body will up its supply to meet the new demand. The extra hours, though, will do wonders for your nipples! Extra time to rest, heal, and recoup.
Second, to the woman who suggested making sure your precious little one has enough of your breast in her mouth– good advice. I didn't know this, and my nipples got SO sore. Once I corrected it, I was amazed at the difference.
Third, breast milk is absolutely one of the best ointments for sore nipples; at the end of a feeding, rub them all over with the last couple drops (you can squeeze some out, too).
Fourth, olive oil is amazing. It doesn't clog anything, soothes and heals, and is perfectly safe for consumption, so you don't have to worry about her getting a little bit.
She sounds like a beautiful little blessing, and you such a good mother! Congratulations on successful nursing this time around, and I pray that it only gets better! There is nothing in the world like it.
God bless!
M. D