hi, iam anamika,iam 37 years old, 5 5 inches tall, we9ght-82 kg.this is my 2nd pregnancy.first delivery was cesarian(4 yrs back).I had ultrasound anomaly scan during 20th week of pregnancy. it shows posterior low lying I placenta , reaching os. what does it mean? what precaution should i take? sometimes i feel giddy 2 times bp reached 150/80, and yesterday it was 130/80. YYYY@YYYY