I am a 46-year-old female who takes propranolol 10 mg twice a day for BP and HR. For the past 3 days, my blood pressure has run around 150/101 and I have this awful headache where I feel like my head is going to explode. I'm not stressed, nothing has changed diet-wise. I haven't missed any of my medicine. Should I call my doctor or is this normal and will work itself out?