Hi! I'm 24 years old and I have a gland under my arm that is palpable (about 1cm or less). It's non-tender, not really hard (a little hard but squishy if I push on it), easily moveable. I noticed it 4 years ago and it hasen't grown or changed. I talked to 2 doctors a few months ago, they both said it was nothing. Should I still be worried after all these years? Would it keep growing if it was something serious?