Pain in the right breast and armpit only like prickly no lump or discharge pimples on nipple went to doctor and said its nothing serious but worried?

Second opinion: If you're worried, why not get a second opinion. Yours is the type of problem that can really only be addressed with a physical exam, so not really going to be able to tell you definitively over the internet what the pain in your breast is due to. Commonly, hormones are the #1 cause of breast pain. But why not see another doctor for 2nd opinion so you can rest more easily. Best of luck.