hypertension

Hello po.. Im on first tri pa (second baby after 7 years), with my first pregnancy, low potassium ko starting 6 mos until nanganak. Now with my second, high blood ako, mataas yung diastolic ko. Ok lang ba na first tri, nagsimula na magtake ng meds for hypertension(safe naman daw accdg to my ob and internst who will co manage) Thank you po. If ever, baka may maadvice kayo na mga pwedeng herbal safe for prwgnancy. Thank you