About a month or so ago, I found a small lump in my right axilla (armpit). I assumed it was nothing and it would go away, but it hasn't. It's hard, a bit bigger than a pea, and doesn't hurt at all. There's no redness or swelling or anything, in fact you can't even see it at all, just feel it. Is this something I should get checked out? I know I probably should, but I just don't want to be making something out of nothing. (and I hate going to the doctors lol)