Ugghhhh!

Am
I typically have a 30 day cycle. A couple months ago I had a 39 day cycle, but every other month is 29-30.  We only BD'd on cd23, So, I pretty much knew I wasn't pregnant.... Now I'm on cd40 and still no AF. Took a test and of course it's negative. I knew that would happen.... Why am I so upset? And where is AF??