Very ichy

I am 31 week pregnant and all I seem to do is ich. It started somewhere around 25 weeks and has gotten to the point where I am up most of the night icing and causing my skin to bead and tear. I went to my ob and they didn't know what it is I went to er they said it was cellulitis and put me on keflex. That didnt help then I went to ergent care the said it was poison. I have never gotten poision. Then I went to my primary care doctor she doesn't know what is going on so she refered me to Dermatology. I also get a horrible taste in my mouth from like my nose and everything smells Rancid. Please tell me I'm not going in sane.