Approx 6 weeks ago I started taking Labetalol for high blood pressure. So now by blood pressure is all over the place , 113/55 pulse 95, 88/53 pulse 93, 95/52 pulse 95, 101/55 pulse 96. Prior to this I have had high blood pressure 160/75, 168/80, etc. I am a 74 year old woman. I am now taking 100mg twice a day. Should I be concerned? Thank you very much.