Aw nako, that's so stressful! At 40 weeks, those on-and-off pains without progress are really frustrating, a few of us moms went through the same thing, parang ang tagal ng waiting game. Definitely call your OB tomorrow or go to your hospital na lang para ma-check ang cervix and baby, kasi they can assess kung kailangan na ng induction or if labor is really starting soon; better safe than sorry when you're this far along, especially if you're worried. Hang in there, mama, alam ko ang kilig at anxiety at the same time ngayon, pero you're almost there na!