I have this small pimple that grew in my left breast when my periods started and it had a white opening at its top like pimple and today on my 5th day of period the pimple is automatically supressed(not vanished completely). Initially the left side had lot of pain around the pimple area but now there is some little inner pain when I wear a bra like some strain on a nerve. And the pain prevails on one path starting from the pimple point to the left hand. I did a self examine and didnt find any lumps on my breast or any size change. Also my whole body aches due to cold. Is the pain more due to this cold or has the nerve their affected due to the pimple growth?