I'm sorry you are having to deal with this, and with no insurance it can be scary
I also have HBP and do not have insurance. Here's what I would suggest for that - If you can't afford a doctors visit, find a walk-in clinic that is affordable. I've found that most doctors charge less if you don't have insurance. Call a few. Before you go, go to walmart.com and find the link to the pharmacy, then print out the list of $4 prescriptions. They have a whole section just for high blood pressure meds. Take the list and see if the doctor will prescribe something from there.
The good news is that regular exercise is a fantastic treatment for HBP. Walking, in particular, has been studied and shown to reduce blood pressure. You should also start slow. As far as how much is too much, only your doctor can tell you that.
Here's a good article from Mayo Clinic that might be of help http://www.mayoclinic.com/health/hig...essure/HI00024