WTF is this? Feet are killing me and I see this...

I am currently 35weeks pregnant and spend the entire day on my feet. I only sit to eat lunch then it's back on my feet some more.

Well I get home today and take off my shoes to see this:

Now my feet naturally ache from being pregnant and standing all day.... but is that seriously a blister? It doesn't hurt to touch it and there is no liquid under the surface. It's just soooooooo weird looking.

Fingers crossed this goes away asap!