Hello doctor....every time i get tensed i get a very bad headache and sometimes very sick please give me a solution and by the way i'm 16 years old?

See a neurologist: These symptoms may represent a specific kind of headache or other neurological condition. You should keep a log of the location, timing, duration, characteristic, and intensity of these episodes and take the log with you to a neurologist. https://www.aan.com/Guidelines/Home/ByTopic?topicId=16 , http://emedicine.medscape.com/article/1142731-overview