Hi there, congratulations on your 3rd baby! Really sorry you're feeling so worried. I would thoroughly recommend investing in a hypnobirthing CD/book combo-it's not too late for you to at least listen to the CD to help you feel calm and ready for birth. It really helped me in the run up.
What things helped you get through the first two births? And what were the best moments of your deliveries? I ask partly because it might help to think about those things, but also because I have never given birth before (also 32 wks) and would love to know!!