Hi Kelly,
We all know how you feel - i was massive had to finish up work at 23weeks and was measuring around 8-12 weeks ahead! Like the others have said it's amazing what the body copes with - i really thought i was going to have mine early and was prepared from around 30-32 weeks but the time continued to pass as i became more and more uncomfortable i lasted til 36+4 and my boys were 2kg and 2.6kg - both of mine were head down from early on and i can't remember exactly when but "Twin 1" was engaged super early and every time i stood up or walked i felt like he was going to drop out lol! - Chin up your doing a great job - pregnancy massage was a blessing for me and i went fortnightly then weekly and that was the only thing that helped - oh and being in water (but i realise you don't exactly have alot of time on your hands!). Rest rest rest or as much as you can - you will be very proud of yourself by the end - well i was anyway! Take care
xxxxBella