Ok. So On The Back Of My Head At The

ok. so on the back of my head at the base of my skull on my right side I have swelling about the size of a golfball. pretty pronounced. my entire family has been sick for over a month, wife three small kids and myself. I have had a 2 round of antibiotics the last one was given 4 weeks ago because I had some secondary infections (double ear infection, pink eye and sinus infection) after the first round given for my throat and sinuses. I don't normally freak out over this stuff but I had melanoma insitue stage 1 five years ago. getting a little nervous here...