Hi I'm 30 Years Old, I'm Pretty Much Healthy. My

Hi I'm 30 years old, I'm pretty much healthy. My reg Dr put me on labetalol for high blood pressure, its about 139/90 on a daily basis and he decided this would be a good medicine to work with since it's safe to be on in pregnancy, which I'm working hard on that. I feel like I get pressure on my chest and my heart races while in the over 50 mp speed, and sometimes I feel like my heart skips a beat and I feel like I might passout is this normal???