Nipple discharge?

C
So ever since I can remember my nipples have always had a little dried discharge on them. I've never even been able to squeeze my breasts and get discharge to come out but I've always noticed it dried. It's hard to scrub off & it's off white. I've never had a doctor or even my breast augmentation doctor question it or act like it was weird until my last doctor I saw she acted like it was the weirdest thing she has ever seen! I've had it my entire life with no issues but now she has me concerned. Anybody else?