A few days ago I noticed a small lump on the back left side of my head. It is hard, immovable, and does not hurt at all. It seems to be more on my actual skull just to the left of where my lymph nodes would be rather than on the lymph nodes themselves, although I am not entirely positive. Now I have a tender spot on the top left side of my head. It feels like the soreness you get from wearing a ponytail too tight, but I have worn my hair down all day so I don't think that is the cause.
I am a 22 year old female, good health (so far!), undergoing ridiculous amounts of stress in my life right now (graduating college, moving to a new state, and had a recent death in the family), and have a history of anxiety. I am not even sure if these two things are related or caused by the stress I've been, but any help would be great.