scratch-like rash?

Monica • Baby boy due June 2017 ❤️
Ok ladies, just wondering if anyone has had a rash or hives like this? It's happened twice now just while I'm laying in bed. I have been sick/nauseous both times I've had it. It feels like I scratched myself and it burns and gets hot and then goes away after like an hour or two, after applying a hydrocortisone cream. After that it is gone/not noticeable. Anyone else experienced this? I have a dr appt Monday so I'll ask them then but just wanted to see what others have to say too. Thanks in advance!