It has to do with my head. I can hear the blood moving thru my head. Like you hear the buzz in electrical wires between streetlights. And this morning when I woke up, I took a drink of water and it sounded like a freight train going thru my head for about 30 seconds. Only drug I'm on is Zoloft but I take some herbs and supplements. What could be the issue? The low humming/buzzing noise is constant.