Uy mama, please consult your OB agad about your BP at yung back pain mo, mas safe na malaman ng doctor kung okay lang for normal delivery at kung ano ang cause ng pain mo. Hindi kami dapat mag-assume ng ganyan, lalo na pregnant ka pa. A few of us mums nag-experience ng back pain during pregnancy, pero kailangan talaga ma-check ng professional kung natural lang siya or may underlying issue. Your OB will guide you better on what's safe for you and baby. Take care, ha!