Uy girl, I feel you, ang sakit nga sa balakang towards the end. Honestly, what you're doing (walking, squats, pineapple) is already the best natural stuff, pero if labor's not coming by 39+ weeks, mas okay na magpacheck na with your OB kasi baka may something they need to monitor or advise on, sometimes ang body needs a little medical nudge, and that's totally okay. Sending you labor vibes soon!