Welcome to HCM.
Since you already have a family history of hypertension
you have more chances of getting them.Ita good that you want to take care before it comes.The BP reading now checked is fine need not worry but definitely you need to take some steps to come early.Make it a point to go for a regular walk atleast for 1hr daily, have low sodium diet. Have high fiber food and less carbohydrate
diet.Have fruits and vegetables rich in fiber content.Avoid oily,spicy,salty and deep fried food.Heaviness may be due to your anxiety
.You can also do yoga to avoid stress
Wish you good health.