It took you a long time to be having high blood pressure. It will take you a long time to correct it.
As I had mentioned take Muktavati and you will see the change immediately. However, quality of life will be so much better if you were not to drink coffee, wine, beer or any type of alcohol. They are all diuretics and bad for you anyway.
Light exercise, raw vegan diet and meditation will be very helpful to you. Also fresh juices will help too with high BP as well as the tumor.
I hope and pray you will get good news from your MRI.