Hi
@JeanChamon, I am so sorry you're having a hard time, but I'm glad you found us.
I think something to consider is that you say you've never been bothered by this until you started researching it, though you've had it a long time. That sounds more like a problem with anxiety than a problem with tinnitus. If you can hear ringing in a quiet car, then you do have tinnitus, but it sounds very, very mild. It sounds like you are taking care of your ears, make sure you take care of the rest of your body as well. You're very young and have that to your advantage. You can set your body up for life starting now (no drugs, loud noise etc.) Those can all mess with your nervous system etc.
If you have anxiety, which I think a lot of people who
suffer from tinnitus have (many have tinnitus but don't suffer from it - like me, now
). Then it might be worth your time to have your parents help you find a psychologist to go talk to. I had anxiety issues when I was teen, though I didn't really understand that then, and talking to someone really helped.
Is tinnitus normal? That depends on your definition of normal. If you really talk to people, especially as you get a little older, you're going to find that everyone's very human bodies have little "flaws." Few people are walking around in totally, completely, flawlessly perfect health. They have tinnitus, a little hair loss, a recurring hangnail, acne etc. Everyone has something. My little sister doesn't have tinnitus (at least the way I define it), but she hears her heartbeat in her ear on one side when she lays her head down on the pillow. I had that too, for most of my life, even before I went to a far-too-loud concert and got tinnitus.
If an ENT checked you out and gave you the all-clear, then the tinnitus will not physically harm you. I would focus on learning to manage your fears and getting help to do that if you need it. It is a good skill set to have for life.
You'll be okay, and if you need support, we're always here : )