Pregnancy rash?

Helppppp!

I’m just over 18 weeks pregnant, and this rash has been spreading since maybe around 14 weeks. Currently, my arms and legs are completely covered. My OB suggested I try pine tar soap, Benadryl, and topical Benadryl. I don’t think the soap does much, Benadryl has no effect whatsoever, and topical Benadryl helps relieve the itch for maybe an hour.

After I reached back out saying it’s not working, they recommended I see my dermatologist. I have an appointment first thing Tuesday morning, but I truly don’t know how I’m going to last until then. It’s SO itchy. I even wake myself up by scratching in the middle of the night and am on the verge of tears. Has anyone found ANYTHING that helps?

OB hasn’t officially diagnosed this rash, but I think it’s prurigo. First time mom here and I can’t fathom going through another 22 weeks of this 😭