I feel ridiculous asking this question, I've always suffered from sinusitis problems, right now my nose is dry but clogged and I can't breath properly, the problem is that I have this weird feeling at the back of my head, it feel weird I can't even explain the feeling, sometimes it feels cold and sometimes I get some headaches (that could be caused by sinusitis problems) but I'm not sure, I have a history of going to the doctor a lot because I have always had this huge fear of cancer (my grandfather died from cancer, he used to smoke, my aunt was a healthy person and she died from cancer too) it all started with the fear of having something in my back, I had a few studies and they all came back negative, then I started worrying about a testicular tumor, I had various testicular ultrasounds done and they all came back normal, now I have this feeling in my head and it's making me so worried, I mean, I don't have symptons of a brain tumor, I already checked, I'm not vomiting, getting extreme headaches, feeling lightheaded, involuntary movements, seizures etc.. but still..