Hi, I am a 31 year old woman. I found a lump in my left armpit this morning and am wondering if I should have it checked out. It isn t painful unless I touch it, but it doesn t move or anything. I know it is most likely a swollen lymph node. I am wondering if I should just wait for a little while and see if it changes. I don t want to read too much into this, but I have been extremely tired lately. I thought it was because I wasn t sleeping a whole lot due to online school, but now I am getting at least 6 hours a night and am still tired. I am overweight, so I have been thinking my fatigue is due to that as well-I joined a gym and am working on losing the weight.