Skin issues third trimester?!

Hey all, looking for some advice.

I’m 35 weeks today. I have this rash that’s broken out on my forearms only. It’s very itchy spots and they almost seem raised and warm like hives. I don’t have them anywhere else and they are driving me nuts! My hands and feet do not itch and I don’t have anything on my belly. I am prone to eczema but it doesn’t usually look like this. I’m wondering if this is common in the third trimester and if there is anything I could do to help? I did message my provide to see what she thinks. Thanks