I have a 14 year old daughter. Two days ago she said she had a lump in her right armpit and that it was tender. You could not see it and you could barely feel it. Last night she said the right armpit did not hurt anymore but her left one does. I can definately see this lump and feel it also. I read on the internet it could be hormones, cysts, etc.... Should I give it a day or two to see if it goes down or, God forbid gets bigger, go to the doctor now?