I also experience breast pain.Mainly tenderness.
It used to only happen a week before my period.Then it became constant.
I did have a rash under my right breast on and off.The family dr said it was a yeast infection.
A pain specialist Dr I see thought it was shingles.There were no blisters.
My breasts are still very sensitive...I can't tolerate to wear a bra.Only soft clothing that is loose.
I have had a mamogram which was normal.The past few yrs I also have had pain,tenderness under my right breast and ribcage.A tightness that is sharp at times when I bend.I was told this was costochondritis.Yet it never has gone away. izzy