I did when pregnant with DS but it was because I was allergic to some reflux medication, twice it happened coz they said noooooo way could anyone be allergic to ranitidine lol But I am, serverely. 2nd reaction was way worse. Got urticaria (sp?) all over pretty much and was prescribed anti-histamines, which did nothing so had to have steroids both times to get rid. 1st time didn't know I wasn pregnant and 2nd time gp was reluctant to prescribe high dose of steriods but LO was fine and nothing else was shifting it.
And OMG I feel your pain about the itching, and once you start you can't stop. I used to use a comb to scratch where I couldn't reach lol Used to sit in a cold bath which eased it off alot, but only whilst in it!