Eh sama lah, masa pregnant memang skin jadi temperamental kan, a few of my mum friends had the same dryness issue around that time, and it usually settles down after first trimester! The brown shimmer on your neck sounds like it could be skin stretching atau hormones playing tricks, nothing alarming lah. Drink loads of water, use a good moisturiser (lepas cleanser dalam 2-3 minits pa nanti, jangan tunggu kering), and try to avoid hot showers sebab memang lagi dry. As for the Downy smell itu haha, that's the famous pregnancy nose, bagus tu, means your body is protecting baby, tapi I feel you la, sometimes the smell sensitivitynya berlebihan gila