You poor thing! I am exactly the same place (also 34 weeks and suffering the heat at work). My work is great but the building sucks, it is really hot and stuffy! I am going to work to 38 or 39 weeks because of finances but at least I have mat. leave so not so bad.

It must be against OH&S for them to expect you to work in those conditions, are you allowed to bring in a portable fan, or is there an OHS person you can talk to?

I have a little desk fan and drink lots of water which is helping... a little. It must be very hard for you in those circumstances, I wish you all the best with it!

Also have you spoken to centrelink about maybe a hardship payment or getting some maintenance money from your husband? Not sure what the rules would be in that circumstance but surely he has some legal responsibility to support you