After Squaffles Lovely positive post, I may as well join in with my contribution -
'Surely I can't get any bigger!'

(Think belly button popping, calf inflating, boob mountains....)
'Will my heartburn get worse?'
Yes. Stock up on rennies.
Everything will get more difficult - reaching for the remote, getting a glass of (acid-inducing) water, breathing, sitting, lying down.... You get the picture)
You may also feel like the baby, or someone else, is kicking you repeatedly in your vagina. All day long, with a crescendo on the evenings.
You may wake yourself up with the volume of your farts and/or snoring.
You won't be able to do anything at all without puffing.
Get some pant liners. You may experience the slightly horrific 'super gush discharge phenomenon' (there might be a medicinal term for this, I am not, in case you haven't noticed, a doctor).
Thought you had veiny boobs now? Just you wait till you get a varicose vein in between your boobs, that everyone can see.
As your body swells to quite frankly, enormous proportions, you may start to get the crazy itches - this can be anywhere but most Likely to be in places that are most un-itchable, nipples and soles of feet for example.
Oh yes, you may be lucky enough to have a ride on the emotional seesaw between bitter rage at nothing in particular and manic, sobbing episodes that tend to follow watching something like the Lloyds Bank advert with the black horse.
You may be one of these people who breeze through the last phase on a cloud of butterflies, but it's useful to prepare for the worst and hope for the best.