Anyone else have this?! Weird rash/itch

Yesterday I woke up and was pretty itchy all over my arms. Throughout the day the itch got worse to the point where I was going to go in to see a Doctor. There wasn't really a rash but my arms were pretty red and on my leg looked like a couple of hives. I thought maybe I was having some sort of reaction to something even though I didn't eat or use anything new. And theeennn all of the sudden it went away...for a bit.

But then at night right before I went to bed I got itchy again and got this weird circular rash. I was SO itchy I didn't fall asleep until like 1:30am. I took some pictures of what the rash looked like..

It was only on my arms and legs 😕

But when I woke up this morning it was totally gone and no more itch.. I'm so confused?

Anyone else have anything like this? What do you think it could have been?!