I'm 5 weeks pregnant, and getting hives very frequently! On my legs, under arms. Help?

Usually getting hives all over my body especially after I shower. I suspect its the soap. But occasional hive attack out of nowhere! Clean room and just sitting down working! 1. Anyone can share if they have pregnancy hives and what's the trigger? 2. Can recommend affordable cleansing wash for body? Thanks all mummies in advance who can give a word of advice!! 😘😘