Hypertension is known as "the silent killer" because damage occurs without your even knowing it. Each and every time your heart beats it has to pump unnecessarily hard to overcome the high resistance of high blood pressure (think of it as a heart having to push blood out against a kinked hose). Over time, your heart enlarges to accomodate this extra workload, and you don't even know it. When it gets too big, the muscle doesn't pump correctly anymore - either it's too stiff and can't relax, or it's too boggy and can't push the blood out anymore. This is also known as heart failure.
The important thing is to lower the pressure. If you can do it "naturally", then great. If you try and you can't, then you should really consider taking an antihypertensive medication prescribed by your doctor. Don't wait until damage has been done, please. Nothing is sadder to see than someone who ignored it for years and years, then there's not a lot that can be offered.