Dear ANAVA: Typically, breast cancer is not associated with pain. However, breasts can be painful. You might consider a breast specialist who can help you sort out the reason for the pain and strategies for its management.
xray evaluation of a lump is not definitive: most painful lumps aren't cancer, but a persisting lump needs more than an xray to be sure what it is. That means a physical evaluation by someone expert in breast lumps, and/or very careful followup, and/or some form of biopsy.