HI Starlover, hang on in there, two weeks to go worst ways. I know this sounds like forever as I've only just got to '1 day to go' and that took forever so I know how you feel, but I also found that once I resigned myself to it being 19th then the days did pass faster.
I also wouldn't worry about the head being engaged or not, when she/he decides to come it will take all of five minutes to get in the right position and start tunnelling out.
Try and use this time to get organised, we made up milk yesterday and washed, sterilised, made formula etc and used the travel system and all the bits and bobs that we are unsure of, the playpen is in and bouncing chair, in fact every single thing is ready except the baby, at least it makes you feel like you are doing something positive rather than lying counting the minutes! I had my hair dyed on Monday and a pedicure, again, just made the day pass faster. You've probably heard all this before but I just wanted to let you know we all know how you feel, doesn't make it better but at least you know you are not alone.
Hopefully by next week I'll be posting my announcement, today is my last mumsnetter day before the C section - eek!