I hear ya! I'm 39+1wks and feel the same, I've been trying all those things too, even though it is my third baby and having been overdue twice already I know that as Clysta says, they dont come till they're good and ready! There's nothing that I know of that does safely help things along until the time is right.
Honestly you can do anything under the sun but until baby is ready - I'd recommend walking as much as possible to help move things along.