Change in blood pressure over short period of time

Hi, I am 23 years-old and have recently been concerned with my health, specifically my heart. You see my Dad passed away suddenly at the age of 49 due to a heart attack 3 months ago. The autopsy came back to us that he had to prior heart attacks we didn’t even know about. Due to the fact my Grandpa just recently died from a heart related illness also about 2 years ago I wanted to take preventative measures to ensure that I do not end up the same way. Back to the question, I have recently found out I have high blood pressure an average 145/90 over the past week, for the past four years I have been a smoker, but I recently just quit (this week). I also work out about three days a week and cardio for 30 min two times weekly since 15 years old. What is odd to me is that I have a low heart rate sometimes as low as 46 beat per minute resting which is a new development (previously 60 Beats per minute at best). I work in an office building where I am sitting down all day and for the past two months I have started getting a lot of head rushes when standing up. I had a physical right after my dad passed away and I got a EKG and cholesterol check done both of which came back great! At the time my blood pressure was normal 120/80. I am curious if you would have an explanation for why my blood pressure would have went up so high in a short period of time and my heart rate to drop lower than it has been in the past?

[Cleveland Clinic]

It may be related to your new sedentary lifestyle and the usual unhealthy eating habits. Are you watching your sodium intake? If not then it is probably the cause of your hypertension. If you want to prevent the risk of developing cardiac disease follow a cardiac diet such as the DASH diet, stop smoking and treat all of you remaining risk factors such as hypertension, elevated cholesterol and elevated glucose levels or diabetes.