Last night, DD (12 weeks) slept a 6 hr stretch for the first time(she usually gets up every 3 or 4 hours to nurse) and takes only 1 side per feed. I've never had any supply issues (touch wood) and her latch is good. Well this morning I fed her left breast. my right breast felt hard so I hand expressed a bit. She also fed that side a couple hrs later but I feel a hard lump on a side of that breast. Any advice?