Wecome to HCM,
You are recently detected Hypertension
so you will be required it to moniter carefully,as you pointed out at least regular use of birth control pill for 3 years? may contribute to high BP
if not the cause of high BP,another thing is kidney problems so you must check renal functions and a Renal ultrasonographic examination. Use of lot of salt or analgesic
may contribute to high BP.
Lack of physical activity may be another.
Salt restricted diet and regular walking exercise 3=4 km /day should improve it.
Family history of Diabetes
so do not forget to check Blood sugar level twice a year.
Stop taking Oral contraceptive pills
with consultation of your treating Physician.