6 years and high blood pressure? It is something to be very careful about mate....
The non-medical advice I could give you (although with my background I would definitely recommend you to follow a medical prescription
) would be:
First of all, about 40-50% young people who have high blood pressure with a reason different from a reaction to a secondary pathology will end up without medication if changing their life styles.
DIET:
1. Try to eat lots of water. even though water intake could increase blood pressure, it makes your kidneys to work faster decreasing the final intravascular volume helping blood pressure levels.
2. Remember to include in your diet Avocado, Olive Oil, Macadamias (or Macadamia Oil), Cold water fish like Salmon or Trout (full of Omega 3.6.9) which will increase your HDL levels
3. Eat as LOW in salt as you possibly can. This includes not only table salt additions, but keeping away from smoked products, salted peanuts or nuts, or animal dried meat.
4. Include antioxidant and diuretic food like Green Tea (my all around favorite.), Ginger, or Pineapple. it will help with the intravascular water depletion
EXERCISE:
4. Yoga should work fine for you since meditation and relaxation produce dilatation of blood vessels lowering blood pressure.
5. In case you do none, try to add some other cardiovascular exercise to your routine at least for 35 minutes / 3 times a week. Exercise in the long term is the main way to lower your blood pressure due to a decrease in oxygen demand and uptake by muscle tissue leaving more oxygen in the form of nitrous oxide which is the main body's vasodilatator...
Take care...