I'm having such awful brain tumor anxieties too. It all started a couple months ago when I woke up with ringing in my right ear. I worried a little the first week of it but not so much the few weeks after. Funny thing is, I felt just fine until I started worrying about the ringing again. Ever since then I've had flashes of lights in my vision, various types of headaches on different places on my head, pressures in my head, stiff neck, dizziness, uneven pupils, numbness on one side of my face, you name it. I'm hoping that since I've only had these since developing the anxiety that it's related.