Hi Lisa,
My son is almost 7 months old, and I went 9 days late from my due date. My labor however started 4 days before I had him. In my final appointment, the doctor did a non stress test to see how things were, and told me unless I went 1 week past my due date, we wouldn't even begin talking about induction.
I had a 'false alarm" on Sunday (went into Labor on Friday), and they sent me home because I was dehydrated. LIke you've been told, walk walk walk walk walk walk walk! Walk around Meijer, walk around the mall, walk around Walmart. Just walk! But also make sure you are drinking about twice as much water as you are drinking now, to ensure you don't get dehydrated.
I did the whole sex thing, didn't work for me (in fact my boyfriend exclaimed "Why can't you be overdue every day???" hehehe)
Good luck!