ok, i'm not a doc, but it sounds lke you might benefit from seeing a therapist to identify what's causing this racing mind. i had those symptoms and got a diagnosis and was put on meds. it's worked for 18 years now. hope you have insurance or does the school you attend have a counselor? keep us posted...that head racing is exhausting. 
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Do not let your fire go out, spark by irreplaceable spark, in the hopeless swamps of the approximate, the not-quite, the not-yet, the not-at-all. Do not let the hero in your soul perish, in lonely frustration for the life you deserved, but have never been able to reach. Check your road and the nature of your battle.
The world you desired can be won. It exists, it is real, it is possible, it is yours..~Ayn Rand
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