Welcome to HCM,
If you have high BP
it should be treated, you can record BP at various time and supine , sitting, and standing position.
If BP is > 160/90 mm Hg your treating doctor may start low dose anti hypertensive.
Other possible way to know exact range of BP is ambulatory blood pressure
Your symptoms like dizziness
may or may not be related to BP also get a ENT check up to see if there is any otogenic vertigo
In the mean time you can reduce salt intake and if possible take regular walking .