Sayang, cramping at 16 weeks boleh normal tapi kena confirm dengan doctor sebab ada banyak benda yang boleh cause it, dehydration, ligament stretching, atau benda lain yang kena check. A few of my mum friends ada alami similar symptoms tapi masing-masing reason dia berbeza, so jangan compare sangat. The sore throat + no appetite + nausea combo sounds like you might be coming down with something, which boleh trigger the aches, tapi the throbbing at your thighs and lower back especially kena monitor closely, better get yourself checked out by your gynae ASAP to be safe, okay? In the meantime make sure you're drinking enough water and resting properly.