Sayang, tekanan darah rendah masa hamil memang common, tapi kena monitor dengan doctor ye sebab boleh affect baby. Please go see your doctor or midwife soon, jangan delay, terutama kalau pusing, black out, or rasa lemas sangat! A few of us mums had this, and our doctors adjust based on our individual cases, ada suruh makan frequent small meals, minum plenty of water, atau rest more. But really, kena get proper check-up dulu so doctor can see what's causing it and what's safe for you. Take care!