BP can be asymptomatic .Symptoms can occur if it is very high like headache giddiness. You can control and reverse your pre hypertension to normal with diet and lifestyle changes
Cut down salt exercise daily
eat plant based foods Cut down oil and all processed foods
cook your own food.
Sleep at least 8 hrs Do meditation, yoga etc. If you want complete reversal of blood pressure take a consult because there are certain tests which you have to do which your Dr. might not be aware because of lack of nutrition knowledge.