Itchy itchy itchy!

For the past few months since I started dating someone new, I have been getting weird rashes all over and extremely dry skin. I have patches of red on my elbows and one on my hand and shin and my entire body itches especially my legs. It almost burns at some points. It never goes away and I have it from morning till night. I have had a CBC, liver function tests, thyroid hormone tests, which all can back normal. Most recently I got tested for any STDs but am waiting on the results. I went to two GPs and a dermatologist, all three a waste of time/money. This all only started when I started dating my boyfriend, who too is itchy but not nearly to my extent. We did try a scabies tx twice which only made it worse. I have had two steroid creams, antifungal, oral steroids, and countless other creams to no avail. Please help if you can I'm going crazy with itching!