This is not medical advice.
A systolic reading of 150 is to be treated as a serious risk for a heart related event or stroke. You need to see a cardiologist. I am 70 and have had 1 heart attack due to generational family history. I have been on statins since 1996 as well as Omacore. I am the longest living male member of my family. I am also the only one that has never had bypass operations. I recommend you purchase a blood pressure monitor for home use. Omron is reasonable priced and accurate. Take a reading upon waking after relaxing and seated after 3-5 minutes. There are many free phone apps to keep a record of your systolic, diastolic, and pulse.
The reading at the doctors office will almost always be higher due to a number of factors. I took mine this morning and I am still over my goal at 127/66 with a pulse of 60. A key to managing is eating correctly, exercise, very little alcohol (I might have a beer 1x per month. Strength training is important but at 150 I would get a cardiologists opinion before starting on any program. Walking is excellent at ideally 6000-10000 per day or at least 4 days per week. Again speak with your doctor.
Periodic blood tests will help you gain a measure of indicative control over the cause and effect of changes to your lifestyle. I have seen a remarkable or rather incredible reduction in my triglyceride levels after taking Omacore (OTC Omega 3 esters) for a while.
I was treated excellently at Bumrungrad for the minor heart attack but left due to my doctor's arrogance and impatience during my queries.
I have since changed doctors and really enjoy my current cardiologist Dr. Apichai Pongpatananurak at Samitivej Sukhumvit. If you think you require more individual care then you may want to see him. A number of Thai physicians aren't very receptive to interaction and act in a hierarchical manner. They know and you don't. Dr. Apichai doesn't operate that way. I have validated his protocols and I am satisfied with his advice, protocols, and results.
Best of luck and don't wait to see a Dr.