Hey mama, I totally feel you, I had GDM din with PCOS, and honestly ang struggle ay real talaga, especially early on when you're trying to figure out what your body can handle. Since you're noticing white rice shoots your sugar up, you're on the right track with alternatives like shirataki rice, but I'd really suggest talking to your OB about a referral to a dietitian specializing in GDM kasi they can give you a personalized meal plan na talagang swak sa iyong body and PCOS, hindi lang guesswork. Sa akin, beyond carbs, I avoided processed foods, flavored drinks (even the "healthy" ones), and portion control din ng fruits, napakabigat din yun for me. Wishing you all the best with this journey, it's tough pero kayang-kaya mo!