Could you say if there are any cultural issues that are pushing this pressure you feel? Are your parents really on top of you all the time? Do they expect great grades or they will feel great shame? Are they shamed if there are any mental problems in the family?
If this is the case, the problem is much trickier. You will have to find a way to stand up to your parents and maybe even everyone you know in order to get what you need.
You may be unable to sleep due to anxiety. Many of the other systems could also be a response to anxiety. Of course they could be from other things as well. That’s why it’s important to get a doctor to check you out. And you have to tell the doctor everything.
Also, you should know that the Doctor is not allowed to tell anyone anything you say, except for a legal guardian if you are under a certain age. I don’t know what that age is. In any case, no one else in the community will find out from the doctor, or you can sue his ass big time. The law says he must respect your privacy.
You do not have to perform up to the record of your siblings. You don’t have to go to the best college. You can still have a perfectly good life. This is America. People are free to make their living doing anything they are good at. You do not have to be a doctor, lawyer or MBA. You do not need a Harvard MBA to succeed. In fact, many people from places I’ve never heard of seem to be doing very well. But I don’t expect you to believe this.
THe real point that you have to face is nothing you are doing is working. You are not doing well by losing all this sleep and studying all the time for no point. In fact, it sounds to me like you might be trying to study yourself into the ground, so if you fail, you will have an excuse for being not so good.
One more thing. Let me tell you about expecting to be a hero at everything. Because that’s what I did. It landed me in the psychiatrist’s office, and later, a therapist’s office. This idea of unrealistically high expectations of myself (try believing you need to be the next Buddha, or something. I’m supposed to save the world, according to my brain)—it creates a huge mess inside you, often leading to the point where you feel the only option is death. Believe me. You don not want to go there. Go to a doctor instead. If your parents fight it, get help from your school. A guidance counselor can set parents straight.
Please?