Thanks for all the replies, it makes me feel alittle better.

I can't tell anyone at work just yet so I must look strange suddenly changing to very baggy clothes and stretchy wasted skirts (as I seem to have a heat aversion as well)

Sneaky, I got some skirts at Kmart, they aren't maternity ones but they are stretch, with a stretchy waist band. I can't live without them now!