I'm on day 2 of pain in left breast- not in my nipple, just deeper. It happens when LO is nursing (not every time) and sometimes just hurts randomly (like if I'm not wearing a bra and lean forward). My OB called in a prescription for Diflucan, but I don't know if I need to fill it. Didn't see any white in LO's mouth this morning. I had thrush with DD1 but don't really remember. Everything I see on Dr. Google indicates nipple pain and pain in both breasts... thoughts? Should I get Rx filled and treat as thrush (boiling and sterilizing)? Or wait it out.