Uy, that combo ng back pain, body aches, at itchy throat sounds like it could be something that needs a doctor's check, lalo na if may sinat feeling din! A few of us moms experienced similar before and it turned out to be viral or something na kailangan talaga i-confirm with a professional. I'd suggest go to your doctor or clinic para ma-rule out kung ano talaga, especially kung tumatagal na or nag-worsen pa, better safe than sorry, diba?