Salam! A few of my mum friends juga ada bp low towards the end, and honestly mestilah kena monitor closely sebab memang boleh affect delivery, but most of them managed normal delivery okay, bergantung how low and how you're feeling. Since yours is quite low (83/48), I'd really push you to discuss this specifically dengan your doctor or midwife at the next checkup, tanya straight up whether it affects your birth plan, sebab they know your full history and can give you the real picture. Jangan tunggu, better to clarify sekarang so you're not worried on labour day. Drink lots of water, make sure you're eating enough, and let them know if you're feeling dizzy or unwell!