Several years ago, I began getting what I called "my dizzies" and it would come and go and only seemed to really happen when I would tip my head back (look up). I went to see my PCP who just looked in my ears, said they looked ok, and wrote me a script for dizziness. The symptoms sort of went away for a while, but have been back in a different way for some time now. When I sing or hum, I get really dizzy and begin to have a hard time seeing. If I fight through it and keep singing, the dizziness and pressure over my eyes can last for hours afterwards. I blew water off my nose, you know, wrap your bottom lip up around your top lip and blow really hard, and almost felt like I passed out. Thankfully there was a fence right next to me that I fell against. If I lay flat, or God forbid hang upside down, it's really bad too. I'm planning on seeing a doctor, but I'm a "guy" so... I'll get there sooner or later. How concerned should I be?