Itchy rash on scalp, neck, upper back, behind ears, and both forearms

[Redchaos]

I had this itchyness and rash begin about 2 weeks ago, it began at the back of my scalp, then spread down the sides of my neck, now it's on my upper back, shoulders, and it is extremely bad on my forearms. I've scratched so bad that I have caused sores on my forearms. I went to see the doctor, and he gave me Betaderm Cream, because I do have an history of eczema. It works with the soothing of the itch somewhat, but the rash is still getting worse, it drives me crazy all this itching.
I was on Champix, and quit taking it about a month ago. I am in the process of opening a new business, and have been experiencing a lot of stress during this process.
I don't know what this is, I know it's not my eczema, and I know it's not contagious because my husband has broken out in the rash and itching.
Does anyone know anything?