My 19 mos. old son still nurses like a newborn, which is fine cause he's my "baby" However this means that if he goes for any length time without nursing, the "girls" are still on high alert and they fill up. Yesterday this happened and even after he drained that breast I have had pain ever since. In one spot it is very tender and sore, although not red or swollen. My doctor says it's a cyst but I'm not sure. It still hasn't gone away and he's been at that breast alternately all day today. How long should I let this pain remain before I seek another doctors visit? I've had mastitis before and this doesn't seem to be it.