If you have too pump too that helps and the nipple cream to put on helps alot too.. Pumping helps releave the hardness faster than a warm cloth plus you van store the milk
You sound engorged. Try a warm washcloth on your breast before you start nursing to help you let down and then ice when you're done nursing. I've heard other things too like refrigerated cabbage leaves but I know that one can actually inhibit supply in addition to helping ease engorgement.
Make sure you are having good lactching with every feeding. Massage em gently under warm water and wear a good supporting bra. Its normal to hurt, if its too excessive is when you should talk to your doc. Good luck.