I’ve got an appointment with my GP tomorrow but could do with a handhold beforehand. I’m 41, very perimenopausal and started my period on Friday. Since Saturday, I’m having shooting pains in my left breast- the kind that take your breath away. Today in the shower, I didn’t feel a lump but a mass of glands (?) that feel very tender to the touch. My right breast feels different/normal. Is this something to worry about? There’s no changes to skin I can see, no puckered skin, discharge or inverted nipple.