Hello, I have been going through a particularly stressful period in my life lately and have been regularly getting headaches when I typically get them very rarely. Also, even though I did not injure myself, I also have a swollen lump on the left side of my head that is slightly tender, but not painful to the touch. I ve never had anything like this happen before, and it developed a little over three weeks ago and has not gone away. What should I do?