And...what kind of specialist do I need to visit?
Hello, sorry no one has answered you as of yet. In your age, tremors would not be terribly concerning. Things like stress, lack of sleep, anxiety, and caffeine could all cause them. You're about the right age for all of these things going on. However, because you don't know for sure, you should tell your parents and then get evaluated. Your general practitioner is the right place to start as they can direct you to a specialist. They'll ask a series of questions and examine you to let you know the next step.
Here is a long article that goes through every thing possible about hand tremors. It's a good read but much of it will not apply at all to you. The important thing to note is your age, your life circumstances and to get seen by a doctor. Here is the article https://www.medicinenet.com/tremor/article.htm
We wish you the best of health.
Hello~I hope you are better by now. Sara has given you some great suggestions, I would also like to add that if you are still having these issues to maybe see a chiropractor, you may have some pinched nerves that are causing the problems. The chiro will take some x-rays, study them and go over the findings with you. After a few treatments, you should start to feel better, I would certainly discuss with your folks.