High BP of 150/110 at the age of 17.

Please help doctors,i am very worried.My BP has been rising since 2017.It was 130/90 back then,it then became 140/90 and now it comes 150/110 everytime.i have bought a BP machine after consulting a cardiologist who said my heart is fine.My echo is normal and ecg says"probably abnormal ecg,slight ST depression,to exclude old inferior MI".my weight is 72kg,height 168 cm,heart rate =95BPM,pulse=84,urea=17,creatinine=0.8,haemoglobin=13.10,my urine culture report is normal.I feel chest cramps and pain in left arm and shoulder and back sometimes.Also pain in waist for 1yr.My recent USGs are also clear but I have stress issues.I worry too much.Is my BP rising due to some other dangerous causes?I also do not drink or smoke.I am just 17 and don't want to start BP medicines as everyone says it can't be stopped once started.Is my life ruined?Please suggest why is my BP rising at this age and what can i do to reduce it naturally so that i never develop it again or have to take medicines.Thank You.