I assume that BP is off cycle?
So you have Stage II hypertension. TLDR you're at significantly higher risk of a heart attack or stroke. Even in the absence of that however, each day in that status is causing cumulative damage to you organs, including increasing the speed and severity of cognitive decline, vision loss, and essentially worsening every condition typically associated with aging.
The best thing would be for you to see a doctor for treatment, but if you want to manage this on your own the guidelines, assuming you have no other serious health issues, are fairly clear.
According to the latest guidelines. best practice is to initiate treatment of Stage II hypertension with a combination of 2 BP meds of different classes, as that has shown to be more effective, at lower doses, with fewer side effects than a larger dose of one med. Ideally you'd want it in one combo pill.
It's fairly easy to get a prescription in 5 minutes online for $20,
So my first question is, do you have insurance? That will determine which med to choose and how to acquire it quickly.