wedding garments for older and mature brides over 40/50

I'm 40w 4 days pregnant with my second baby. This is the second night in a row that I have an itchy rash on my arms and legs mostly and only at night. There are bumps and it is red. I can't seem to get a good picture. Anyone have any experience with this?? I am calling my ob tomorrow but just wanted to see what other people's experiences were like!! wedding garments for older and mature brides over 40/50