Dear Madam X,
I think perhaps you need to establish yourself with an Internal Medicine physician who is very capable of handling your hypertension. I am not sure that your meds would have caused the heart attacks if they truly were Myocardial infarctions as I do not have all the details. They may have given you chest pain.
BP readings consistently at 140/90 mm Hg are considered to be hypertension. Some data indicate that 115/75 mm Hg should be the gold standard.
I am not sure where you live so it is hard for me to advise you on physicians. In the USA most cardiologist would see you more often than yearly if you have severe cardiac problems.
I wish you the best in finding someone to provide you with the right medical care for your conditions.
Take care and gentle hugs to you