Breat pain

I breastfeed my 1 year old. And today I noticed that I had sharp pain (not horrible but not comfortable either) on my left breast on the side close to my armpit. When I press on it, it hurts a bit but not every time. Its not the feeling of being engorged or anything I have felt since I've been breastfeeding. I haven't pulled anything or have slept wrong. Has anyone ever had this feeling ?