A home monitor is the way to go. You might find a wrist monitor pleasanter to use. Medics claim it isn't so accurate - I don't know about that, but whether in hospital or GP surgery, I have very seldom had my BP taken in the correct manner, and of course we don't know how often the machines are calibrated. So there is always a bit of wriggle room. The home monitor, whatever type you use, will show trends, which is why it's helpful to test in different situations. Results differ for different people, of course, but for me, my BP is higher in the morning, when it is cold, when I am hungry, just after I have taken exercise (my only exercise is walking) and of course if I am stressed. It is at its lowest about half an hour after my evening meal, which is my main meal of the 2 a day I have, so that's the figure I take as reasonable. I have appalling white coat syndrome, so I don't take any notice of it. Hospital staff are used to this and never bat an eyelid - GP surgery less so, but they also have an agenda to fulfil re: prescribing meds/earning money for the practice.
I used to earn my living in jobs that required hairtrigger reactions, also had hobbies that needed the same, and though I am retired and too old for extreme sports, the fast reactivity has never left me. I suspect it has always been part of my biological makeup, hence our mantra "we are all different", though medics long to shove us all in the same box.
All the best with your progress.