J.E.
the best thing to do is get Sarna lotion at walgreens or cvs it is steroid free and smells crazy but you will be so happy. I did use aveeno baths and that helped for the 20 minutes I was in the bath and then I still had to use this great but awful smelling sarna lotion. YOu can go on steroids for your pregnancy and you can also do IVIg but this is such a scary thing. It is the blood from 1000 of people and you infuse it every 28 days. I luckily did not get pupps till 32 weeks and delivered at 35. Just pay attention if the babys movenemnts slow down get yourself to the dr and I would be on modified bedrest for now. There is no cure jut delievery and some women cant breast feed. It is the hormones they say that does it and as soon as I stopped breat feeding the pupps went away and I was even on steroids to get it to go that did not help. I saw a reproductive immunologist that said it was the male blood entering your blood stream somehow so it will be interesting to see if you are having a boy then he is right I guess. OTher OBs have no idea or care to know or are even wrong with their guesses!
Hang in there , get the sarna cream, ask the dr if or when it gets that bad if he will presecibe steroids no more than 20 mg of predinsone ok.
good luck
J.