Palpitations and blood pressure.

Hi, from the past 3 weeks I continuously feel a throbbing pulse at the back of my head. The pulsating feeling gets enhanced while laying down. Also, I feel lightheaded most of the time during day. I had my first panic attack around 2 months back. Since then I have been under constant stress and anxiety related to my health. My average pulse rate during day time is around 85-90 while at night time during sleep, it goes down to around 60-70. (I am measuring using my smart band) My blood pressure from the past 1-2 weeks has been in the range 135-150/78-85. I had been taking the medicine ciplar la 40 and petril md for 10 days around a month back. After then I stopped the medications and started doing 30 minutes daily brisk walking along with yoga. However, still I am facing the palpitations. Please suggest me how should I proceed further. Thanks