Sabar ya, you've already tried so many things, memang exhausting bila dah 40 minggu and still waiting! Nipple stimulation memang selalu disebut as one of the more effective ones, but ramai yang share the same experience as you, the contractions come and go without really progressing, so don't feel discouraged by that. My own experience, acupressure at certain points on the ankle and between the thumb and index finger was something my doctor actually mentioned as worth trying, though she was careful to say it works differently for everyone. Some mums also find that consistent walking, bukan sekali sekala tapi lebih kurang 30 minit, beberapa kali seminggu, helps baby engage deeper into the pelvis, which can encourage things along more gently. That said, since you're already at 40 weeks, it would be really worth having a proper chat with your O&G or midwife about where things stand, just so you have the right support and monitoring in place, they know your case best. Semoga dipermudahkan, you're doing so well!