Welcome to HCM
We understand your concerns
After going through the details given by you, it might be difficult to come to a proper diagnosis.
I suggest that your blood pressure (diastolic) is a bit on the lower side (it depends on your physic and other details). Dizziness
and passing out must have some relation to that.
I further suggest to consult a general physician and check your BP consistently through several weeks and come to a diagnosis. You general physician should be able to help you much better.
I hope I could answer your question satisfactorily. I am available to further queries, please feel free to contact.
Get well soon.