@meali
I had similar situation, years of high blood pressure and then started getting dizzy due to low blood pressure. In my case I had lost lot weight due to bariatric surgery and was eating less and healthier but still taking meds for high blood pressure. I saw my primary provider who readjusted high blood pressure meds.

Are you currently taking BP meds? Do not stop taking meds without consulting provider, I advice checking with your provider about change.