Hey, I am 39 weeks preggers too!
Rasberry leaf tea makes the braxton hicks/practice contractions morestable/stronger, which aids you in prep for real labour as your uterus has been practicing - good to start drinking from 36 weeks.
Semen has hormone prostoglandin in it, which SOFTENs the cervix, it doesn't bring on labour..though a good romp could! Softening the cervix obviously helps though as we want it to soften, stretch etc for birth. I personally woulndt go to curry's the white goods store, don't know about you but this whole nesting thing has me dying to spend money and refit my house lol..but curries too, I would be worried about poo-ing mid labour...I have enough to worry about than floaters in my pool, or not so floating post currie poops. Nipple tweaking/having sex/kissing stimulates the release of the hormone Oxytocin, which can induce labour or make it easier. During labour and the breaks, try kissing partner, having him caress you (doesn't have to be like full on or even when midwife is there, just when you can steal a moment, as this works!) Definitely visualise a positive labour, and a positive opening. Your body is made for this and can do it, and the more positive you think about it the more likely you will bring it on. All the best (if since friday you have tried all these and you are still waiting)
I have the same as you and broke my coccyx just before I got pregnant, so I too feel your pain. REally do hope it goes well for you :)