Internals don`t hurt at all, I was bleeding when I had both mine at 6 weeks and again at 8 weeks, it didn`t make my bleeding any worse then it already was.

Funnily enough my internal at 6 weeks we got a clearer picture via abdominal then internally.

I`m not sure what you`d see at 6 weeks, 5 days as you know with my 6 week scan all we saw was 1 gestational sac and no baby and my pregnancy was classed as non viable then at 8 weeks we saw 2 sacs and 1 baby, always makes me wonder where that second sac was hiding at 6 weeks :-k

Good luck Tegan