Weird neck rash

I wore a shirt that for now I'm assuming irritated my skin. But I have worn and slept in the shirt multiple times and it's never irritated my skin before. I have a light pink small rash on my neck under my chin. It itches like crazy at random time. The I side of my elbows and knees have started itching with no rash as far as I can tell.

AF is supposed to show up either tomorrow or Friday and I am prepared for her to show... But I can't help hope she doesn't and I'm pregnant. Today was exactly a year trying.

So my question is can it really be an early pregnancy sign?

If I'm pregnant this will be baby #1.