Sayang, ini sounds like hyperemesis gravidarum, very serious lah. Please go see your doctor or go to hospital immediately okay, jangan delay lagi. Losing 2kg in one week and cannot even drink water is not normal pregnancy nausea, and you need proper medical help to make sure baby and you are okay. A few of my mum friends had similar situations, and they really needed close doctor supervision and maybe more support than just IV drips. Your doctor can check if you need different treatment or if ada other things going on. Jangan tahan sendiri, this one really needs professional care, okay babe?