Sorry, I always think of blood pressure when I hear BP. 4 weeks seems way too long. I would try to get something sooner. You can usually get fast attention if you go to an ER with the problem. I had to do that when my family refused to see that I was having problems. My sister-in-law even told the counselor that she thought I was faking panic attacks. WHY would anyone fake that? Any way ... good luck.