I know that you have a lot of homework to do right now. So I want to tell you something that might help you. If you have 15 or 20 minutes to spare, I can save your night.
First of all, if you have some relaxing music it would help. But I want you to concentrate on your breathing. Start by breathing in through the nose and out through the mouth. Do that about 10 times. Then breathe strictly through the nose with your mouth shut. Let your tongue touch the part of your pallet that is directly above your front teeth. That should be a relaxed position for your mouth. Do not clench your teeth.
Now start with the top of your head. invision every hair, your scalp and relax it. Then gradually relax every muscle in your body until you come to the tips of your toes. Your shoulders may be the hardest because they hold so much tension. Don't leave one muscle group to go to the next until it is completely relaxed. By the time that you are done, your mind will be ready to study and do homework again. With practice you will be able to do this within 5 to 10 minutes. And there you go. Now try that and see if it doesn't work. I bet you will feel a lot better when you are done.
thanks to everyone who has posted... I'll keep all of your words in mind... I plan to take a break from all of this and try to clear my mind... everything seems so muddled right now.