Hmmm, don't know about the risk of still birth...? But most hospies let you go at least 10 days over. With me, because of public holidays etc, they were going to let me go 2 weeks over, as long as I had a scan at 10 days over to make sure baby, fluid level and placenta were ok.
I didn't even have to think about it, because she arrived after 7 days. I know it is so frustrating, waiting. But hopefully bubs will decide on their own to show up for you soon! All the very best for your very rapidly approaching birth!