Woke up to Itchy Rashes/Hives

I woke up in my hotel room early Tuesday morning to an itchy rashes on my right hand. I started scratching and it felt like my whole body's itching. I took my blanket off and sure enough, I have rashes/hives all over me.

This is how it looks like when I woke up the first day.

I have never had something like that before. I called my doctor and he told me to get Claritin, zyrtec, and benadryl. Few minutes after I took claritin, the hives started to clear and so was the itchiness. However, after few hours it came back again.

Rashes/hives came and go. It changes forms but it didn't matter how it looks, it was pretty itchy.

When I got home from my trip, I took benadryl and went to bed. After couple hours, I woke up feeling nauseous and just didn't felt good at all. I went to ER, the doctor gave me benadryl IV and prednisone. After few minutes, skin cleared again.

Wednesday, Thursday and Friday, itchy rashes/hives was on and off. Sometimes it was more of an on than off.

Saturday morning I woke up to a clear skin. And it has been days without any rashes or hives. My lab test came negative as well. I do believed that what I had was Cold Urticaria. I will never know for sure until I get allergy tested for it.
Sometimes it covers my skin red, itchy red

Other times just little dots, itchy red dots

This what it looks the last night I had it, the next day there were no any trace of it.