Why Are The Gland Under My Arms Swollen?

hi i am 29 year old female i have 2 glands swollen under my right arm. i saw doc actually 3 different doc who examine my breast and they say they cant find nothing. o have mild pain under my arm and my breast been hurting last 3 months. i had blood test it come back normal. i been painting my house last 2 months can that have anything to do with my glands swelling thanx doc