Do I have a small cavity/tooth problem?

There are a couple things that can cause sensitivity in your mouth, however it is really important to brush twice a day even if you have "perfect" teeth. If your teeth have a green tint then you really need to be brushing more efficiently and go see your dentist. If you have a cavity then there is not any thing you can do to make go away you must go see your Dentist... however to prevent further cavities you need to brush more often and get a fluoride rinse from your local store. But it is very important to go see your dentist! and why can you not tell your parents? I would not rely on just getting information from online and go see your Dentist so they can properly help you with proper educational advice