Wa'alaikum assalam hun, I know it's scary tapi jangan down dulu, GDM is manageable and banyak mums manage it successfully sampai deliver healthy babies okay. The important thing is you caught it early and you're already seeing the doctor, which is exactly what you should do, sebab the high readings kena monitor closely and doctor akan guide you through diet, exercise, maybe insulin if needed, tapi semua ni is to protect you and baby, bukan bad news pun. A few of my mum friends had GDM and dengan proper monitoring and following doctor's plan, they delivered perfectly fine lah, one of them kena insulin tapi baby was healthy. Right now focus on the appointment with your doc, discuss the numbers and what comes next, and don't Google-stress yourself more, your medical team is the best source sekarang. You can do this!