I'm back from the doctor, and I'm glad (and embarrassed) to say that it is not a lymph node. It is an infected sebaceous cyst. He wrote me a prescription for an antibiotic (Kelfex) that I will probably not get filled right away. I'm going to try to heal this on my own, although I can feel the infection making me feel sickly.
My blood pressure was also very high...maybe because I've been drining Sole? I'll have to keep an eye on that.