Hi this last night after having sex with my boyfriend i noticed a small tender lump near my left nipple, might be Montgomery gland. He squeezed my breasts during the act, so I thought it ws that. Well this morning it was still there but not as large, about the size of a small pea. Still hurts, i squeezed it and pus came out at first, but then just a clear discharge and it shrunk, but is still there. Any ideas? Shoould I be alarmed?