I missed a really obvious thing about a work project and over-complicated it like crazy. I was so anxious that I wasn't understanding the complicated stuff that I missed something incredibly blindingly obvious that was simple. I've been getting very little sleep, too.

This has sent me spiraling even worse into anxiety.

It doesn't help that the person who is working on it with me constantly displays her frustration. 

Supposedly, I'm pretty smart, but every so often I miss these really obvious things, even really obvious things that people have warned me about.

What if I'm just an idiot? What if there is just something fundamentally wrong with me?