Do lots of walking, drink lots of water, do some squats (with something to hang onto of course), roll or bounce on an exercise/birthing ball, hot shower, nipple stimulation/sex/masturbation (anything that gets the oxytocin rolling!)
I wouldn't worry too much about your baby not having dropped into place yet - that might happen any minute now. Fluid levels and a deteriorating placenta aren't really a concern until after 42 weeks or more - unless there are other factors affecting you individually it shouldn't concern you yet.
Have your bf squeeze ur nipples hard for a little bit during sex.