Hey mama, congrats sa pregnancy! Honestly, 12-14 hours on a bus ay medyo mahabang travel lalo na first time mo, a few of my preggy friends nag-long bus rides din pero mas comfortable sila sa shorter trips, plus the sitting position for that long can make you swollen and uncomfortable sa legs. I'd really suggest checking with your OB muna before deciding, especially to make sure everything's progressing well and if it's okay for your specific case, kasi bawat pregnancy is different. If doc gives the go-ahead, make sure maraming comfort measures, aisle seat para pwede ka mag-stretch, walk every couple hours pag may stops, at stay hydrated talaga. Wishing you an easy trip if you go ahead with it!