I pumped for the very last time last week on Sunday (9 days ago). I had only been pumping 1x a day (no bf'ing) getting about 3-4 ounces for about 3 weeks. So my supply was really low.

Just last night, I started to feel a lump. It's not quite painful, I can just tell it's there and it's slightly uncomfortable. Do you think I need to do anything about it? Will it work itself out since I have weaned? Can I massage and heat without pumping? I haven't had mastitis and don't want it now!