Uy mama, itching all over during pregnancy is actually pretty common, a few of us had it din, usually because of hormones and the stretching ng skin, pero honestly kailangan mo talaga i-check sa OB mo kasi sometimes it can be a sign of something na kailangan bantayan like cholestasis, lalo na at 28 weeks ka na. In the meantime, try moisturizing regularly with something gentle, stay cool, and avoid super hot showers, pero please don't delay the doctor visit, okay? Praying it's nothing serious and just hormonal itch lang!