Breastfeeding and I noticed a lump last night?

I finished feeding my daughter and about 30 min later I thought I was engorged so I felt and there was a large lump on my left breast (toward the top, close to my armpit) I decided to try and feed my daughter some more on that side hoping it would go away, but nope it didnt. So I massaged it and just went to bed (it wasnt painful, just annoying) I woke up this morning and I was going to call the Dr. but it was gone. So im just curious to know what it was ? A plugged milk duct maybe and I just massaged it out ?!

thanks for any answers:)

Sounds like a clogged duct to me. Good think you were able to massage it out or else it could have turned into Mastitis. SO not fun!!! Next time you find one, hop in a nice warm shower and massage that sucker. Good Luck