@burcidi-- That's quite common actually, I had the same type of itching during my pregnancy. It is because the skin is stretching out but it goes away after delivery. When I was pregnant, I used calamine lotion and aqueous lotion. These are good antihistamine cream alternatives for pregnant women.
I think there might be a few antihistamine creams that doctors do prescribe but I'm not sure what they are. It would be best to talk to your doctor about it.
I have heard of pregnant women using cortisone creams but again, not sure which ones and whether it's totally safe. I'm inclined to think that it is not any more safe than antihistamine creams.