Uy, 130/80 sa 21 weeks ay kailangan i-check ng doctor agad, ha, please don't wait on this one! Blood pressure changes during pregnancy ay serious, lalo na kung second time mo na, kaya go see your OB immediately para ma-monitor properly. In the meantime, try to rest, reduce stress kung kaya (I know, easier said than done with kids!), and limit salty foods, but yun lang, the real management kailangan ng doctor mo, okay? You've got this, mama.