Diagnosed with Allergic Contact Dermatitis

Hello!
I am a healthy 74 year old woman who woke up with a very itchy rash a few days ago. It started on my shoulder and upper arm. I have a few spots on one breast.

Two years ago I was treated for Lichen Sclerosis. I called my dermatologist and was told I could see her after Christmas. I don't think so. I actually consulted an online dermatologist. I sent photos. He was almost sure I have ACD, and prescribed Clobetasol.
My rash seems to have spread some, and this overthinker is wondering why. (I checked him out - very reputable)

I am almost sure I got it from a mesh soap bag I was given as a gift. I used it several months ago one time and let it hang in the shower. Several days ago, for some reason, I used it again. I even remember concentrating on my under arm to make more bubbles. And boom! The rash occurred. How stupid of me to use it after all that time. Soap will not kill bacteria, fungus, etc.

Does this resonate with anyone? I have no idea what to expect as far as duration. I want to dig my nails into my skin, but I know that's the worst thing to do.

Do I change soap? Detergent? It does not seem necessary, because this never happened before with these products.
Any ideas will be appreciated.

Thanks much!
Peggy