Hi Boo,
S&S is ok with a VBAC, my Dr was going to do it for me at 41 weeks but my cervix was so high & closed he couldn't reach it. I went into labour 3 days later anyway.
I did have a S&S with DD1 but I honestly can't remember how long it was after that before I went into labour, I think it was only a couple of days.
It is usually quite uncomfortable but bearable; kind of like a really heavy duty pap smear
I do wonder if 39+5 days might still be a bit early for bub? How long will your Ob let you go past 40 weeks?
All the best