Iv noticed only now what feels like a few little lumps like a cluster of hardness on my left breast at the top,feels like it did during the first week of breastfeeding..Ihave not noticed this since then so its been months ,as DD is 7 months now.

Could it be mastitis(sp) ? it only feels uncomfotable if i press really hard on it.
what should i do?

I might add that this breast does get a good comfort sucking workout