Well, I found it three months ago. I've been sticking my head in the sand about it and hoping it would go away but it hasn't.
Small and hard, about the size of a pea in my armpit next to my left breast. Finally went to the doctor today and I've been referred for scans.
Doctor muttered something about being a cyst, so I'm hoping that's it. Has anyone else had this and it's turned out fine?