I’ve been similar today, but the contractions seem to be more intense even when I’m lying down now (also 40 weeks)
mine was like this which started on thursday and gave birth on saturday but during each examination they said its normal because the cervix has to go through various different processes of thinning, moving and dilating so the timings can fluctuate. I bought a second hand birthing ball off fb to help with moving right at the end because I couldn't sit comfortably or walk very far I think helped but it might just be a bit of a waiting game.
Are they painful? Sounds imminent to me and similar to my experience. 10 mins apart Thursday night, stopped by Friday morning, sporadic throughout the day on Friday and was pushing by 11pm on the Friday night