I may need medical help!

OK, so last night, Nathan was out of town. So the remainder of the Headleys stayed at the condo with GhiGhi and Papaw. I was watching some TV, getting ready to take Eli upstairs when my shoulder started itching. No big deal. So I am laying in bed around 12:30 or so and my hands start to itch, the palms. Weird. Then the backs of my hands, then my shoulder, then my stomach. But, my hands were driving me insane. They itched like you wouldn't believe. It almost felt like I had not washed soap off of them. So, I got up around 1:00am to go wash my hands to see if that will help (I have no idea why I thought it would, but it made sense in my stupor). Then, for some reason, I pulled up my t-shirt and OMG!!!! I had huge blotchy rash spots all over my trunk, mostly on the right of midline, and some on my legs. What could it be? I thought maybe shingles. I didn't know. Luckily, I had some hydro-cortisone cream in my bag and rubbed it all of the effected areas. And what do you know?... It was gone by morning. Seriously, I am dying to know what it is/was. Nerves? Aftermath of my visit with Sam and Ella? Allergy to something? Maybe our detergent? It did seem to be mostly on the side I was sleeping on. But why would my hands itch? And why would it just go away? These are not rhetorical questions. Anyone got answers?