I just think it all comes down to when the baby is ready to come. I did everything possible in my previous pregnancy and my water bag leaked twice and yet I still didn't have my son until I was 41.3 and that's because I was induced!! I walked, went up the stairs, down the stairs, non stop, sex, ate certain foods, exercised, n*pple stimulation, cleaned like a madwoman, even moved some furniture, and while I had severe contractions for like a month straight, nothing happened. I was stuck at 2 1/2 cm for that entire time lol.
However, with my second I cleaned a lot and did have sex a lot and yes I went into labor soon after. I just think it depends on whenever the baby is ready to come but it doesn't hurt to try and yes nesting is supposedly a sign that you're about to go into labor but I heard it could be like that for a month or so before actually going into labor. Sucks not knowing, when you just want your baby already.