Wa'alaikumassalam sis! Ohhh this is important lah especially since you've had it before, honestly, a few of us went through the same thing and the main things yang help are staying active (even just jalan-jalan), eating smaller frequent meals instead of big ones, dan avoiding sugary drinks yang boleh spike blood sugar fast. Since you're only 11 weeks, this is actually a good time to start these habits sekarang juga before screening time comes around. Best lah you check in with your gynae early about your history, dia boleh monitor you more closely and maybe refer you to a dietitian who knows about GDM prevention. Good luck mama, you've got this!