I found this on the underside of my right breast yesterday & I'm worried. Going to the doctors on Monday. I’ve took leftover antibiotics & put sudocreme on it but still the same. It hard, it’s burning/tingling it’s not a ball shape it’s like long & rigid. I am breastfeeding have been for 18 months without any issues I don’t think it’s blocked duct or anything. I’ve also had a cyst in my armpits for a year & a half which I’m having a scan for in January. I have health anxiety & this on top of everything else I’m worried. Anyone had anything that looked/sounded similar?