Welcome to HCM,
Thanks for posting your query to this forum,
After going through details you have provided,you are Hypertensive and i presume taking care of your BP nicely and you BP readings are in desirable range.
As you are having long standing high BP
there is possibility that there may be some Hypertrophy of heart it is not serious don't worry , which can be seen in X ray as cardiomegaly
but assessment by x ray alone may not be accurate it is advisable to get @ D Echocardiography
which will tell us accurate size and thickness of heart along with pumping function called LVEF.
You do not feel any symptoms like breathlessness and angina
unlikely to heart failure
.If required adjust your BP medicines with consultation of Physician.
Please do not worry just continue to take your antihypertensive medications and keep BP to optimal level .
Even hypertrophy of heart regresses if we keep good control of BP.
Please take care