Ahhh I feel for you, pregnancy itch is the worst especially when it suddenly jadi macam tu! A few of my mum friends experienced something similar towards the third trimester, and one of them realized it was the new house dust + hormones making her skin extra sensitive, definitely check with your doctor first though, just to make sure it's not something like cholestasis or allergies yang need proper attention, especially since it came out of nowhere. In the meantime, try switching to a gentler soap (maybe something fragrance-free), pat dry instead of rubbing, and moisturize immediately habis mandi with a thick cream, the nyilu-nyilu feeling sering jadi because your skin is super dry and irritated, bukan the itch itself. Don't worry, this usually settles down after delivery, I promise! Hang in there, mama, you're almost there.