So I'm 21 and I think I've had tinnitus for about a week but it sounds like a high frequency noise. I'm not talking about a really high pitched note. I'm talking about the sound you hear when an old CRT turns on. I only get it in my left ear and it's fairly quiet but there just enough to be bothersome. I have no idea what caused it since I don't listen to music too loudly, I don't think I'm sick, and I've never had a head injury of any sort. It just kinda started. I went to get a physical and I don't have any ear blockage either. I'm not even sure that it is tinnitus because I've heard that high pitched noise you get when you fire a gun without ear protection or directly after a concert but only very temporarily. Can someone even tell me if I have it or if it's just some dumb thing that is gonna go away in a couple days.