Aduhh, risau tu normal la, but sudden mual dan muntah at 7 months isn't something to brush off, could be anything dari food aversion, dehydration, atau something else yang kena check dengan doctor. A few of my mum friends went through similar scares mid-pregnancy, and most turned out fine once they got checked, tapi better safe than sorry kan, especially when you're not managing to eat and drink properly. Try to sip small amounts of water or plain broth, rest up, and call your gynae today je to get peace of mind, tak payah tunggu lama. Sending hugs, you'll be okay!