Ay sis, 38 weeks and 2 days, I feel you! Okay so a few things na nag-work sa mga kaibigan ko: the birthing ball is life talaga, especially if you just rock your hips while watching Netflix (multitasking, lol), it helps encourage dilation way better than just sitting around. Someone in my mum group swore by pineapple juice, eggplant parmesan, and spicy food, at she actually went into labor naturally at 38 weeks 6 days, so maybe worth a shot? Pero honestly, a lot of mums also say na sometimes less walking and more relaxing, like cuddling with your partner, staying calm, can help your body actually let go rather than tensing up, which sounds counterintuitive pero it makes sense.
That said, kung 38 weeks pa lang talaga at walang signs pa, your baby might just need the extra time, so definitely check with your OB what they recommend, they'll know best if anything else is needed or kung safe lang talaga to wait. Fingers crossed for you!