I had urticaria during pregnancy. I really hope it's not PUPPS - it sounds really awful. Urticaria was bad enough. I found sudocream made it worse. I ended up taking Polaramine and it worked. I hated taking it but was told it would be OK. I also found having lukewarm baths with baking soda helped. The main thing for me was to avoid heat.

I'd see your doctor. If you're worried, called Rodney Whyte at Monash Medical Centre - he's the go to person to ask about drugs during pregnancy.

GL