PUPPP is killing me

So I wonder if there's some kind of medication they could give me to numb all of my skin for the next 11 weeks. A girl can dream.

Today the rash has officially spread to my back and behind my knees. It's slowly taking over my entire body.

I can't even begin to explain the magnitude of the itch. Imagine a million tiny spiders crawling on you, and the spiders have tiny spider head lice, and the spider head lice are carrying poison ivy in their tiny pockets. Now multiply that creepy crawly itchy feeling you just had imagining that, by like, 1350285384763068. That's how unbearable this is.

I have a doctor's appointment in 11 hours, so maybe he can come up with some miracle for me.

ETA: My OB sucks. He just referred me to a dermatologist who didn't have any available appointments until next Wednesday. Bah!

I've never been allergic to anything in my life. I've never come in contact with poison ivy or sumac. The only itchy skin thing I've ever had is bug bites -- and a little Calamine lotion and a couple of days is all those need to heal. I'm stuck with this ridiculous rash until after Jack is born. So roughly 11 weeks. But, I've read online that in particularly aggressive cases of PUPPP, that the mom will be induced early. I'd like to carry him until 40 weeks, but not at the expense of my ending up in a mental institution because this freakin rash is driving me crazy.

I'm 29 weeks and 4 days pregnant, and I desperately need this Benadryl to kick in so I can try to sleep.