Suggest Treatment For High BP And Headaches

I just received info from an MRI that I have Chronic Microvascular ischemic changes. I was seen by a neurologist because of mild cognitive problems, dizziness and headaches. I am 69 with a history of high blood pressure (controlled by medication), celiac disease (diagnosed 9 years ago after years of medical issues), low white blood count ( leukopenia, neutropenia). My family has a history of dementia and Alzheimer s which is what prompted me to get checked when memory issues started and dizziness. Is there a follow-up plan you would recommend. The doctor I saw gave me the info and said try and lower BP, no other recommendations or follow-up. Thank you for any info and recommendations you can provide.