Highly recommend going to a doctor first. Blood work, conversation, if possible look at your parents history that could show maybe you have something genetic passed down that would result in higher blood pressure.

Maybe it's a simple as diet and exercise. Maybe it's more serious and you need medicine. Usually better to start with the professional first then work your way down to the woohoo

If you did that already good luck and watch out for those pushing their vitamin and everything under the sun. Lots of nonsense out there