Hi, From what you have mentioned, you seem to be manifesting symptoms of anxiety. An anxious state leads to increased heart rate, dizziness, increased sweating, tremors, tightness in chest. Often such symptoms can suddenly exacerbate leading to a heightened state of anxiety which results in panic attacks. I would suggest that you discuss your symptoms with your parents and consult a psychiatrist for initiating treatment. Medications like paroxetine would be beneficial in your condition and will help control your anxiety. In addition, you should start exercising daily. It will help you relax and feel better. I do hope that I was able to answer your query. Best wishes.