Suggest Remedy For High Bp

I'm vineethchowdary 25 years old i work as software engineer one day i had felt down from bus so i went to doctor so they had checked my BP at that time it was 190/100 they told to take rest for that night and they have rechecked on next day afternoon and it was 160/80 and doctor has assisted to take some check up. I had checks like chest x ray, blood tests, blood pressure monitor, ecg , kidney function and CT scan for brain but they are normal and doctor told to wait for a couple of weeks to have again a checkup but two day back i had checked by BP it was 150-160/80-90(two three checkups),so the problem is still continuing so how can i over come it with out any tablets.but now my health is good but some times if i work more than 10hrs per day i'm feeling headache if i'm feeling any tension or any such thing my heart beat is increasing and again i'm getting headache and also i'm feeling uneasy.In my daily work some times unnecessarily for small cause i'm feeling tense so how could i over come it with out any medicine by daily diet and etc.. and please suggest me the best thing to reduce tense. My Height ---182 cms Weight----86 Kgs