I think I have a swollen lymph node in-between my arm pit and my breast.  I am breastfeeding an 8-month-old right now.  I dont feel sick.  The strange thing about the small, pea-sized bump is that it moves around under the skin a bit and it pulses with my heart beat.  Any ideas of what this could be?  Should I be concerned?  Thanks.
Hello!  Since you are breastfeeding it could be a milk lump.  I suggest you place a warm compress over the area for 15 minutes 3x/day to soften the lump and pump out milk regularly.  If it persists, you need to see a physician for a complete breast exam.