Maybe like Martin says it will fade. Why don't you try to focus on your work and give this a couple of days.
Distract yourself from thinking about yourself, if you can, by creating another intellectual "puzzle" instead of your present state of mind. Another trick is to hold something small in your hand and focus on that item -- how it feels to the touch, you know, like "worry beads" (I guess the name says it all). Even a paper clip will do.
Another thing to do is to pick up a good mystery somewhere and start reading it. Agatha Christie, perhaps? Lots of good stuff is around. Or think about writing your own mystery story and occupy your mind with that.
The thing I'm getting at is that you want to have several possible things to occupy your mind -- all of them CONCRETE, not just vague ideas. When you hold something in your hand and turn it over and over and feel it, you can focus on that. When you think about writing a story, you can invent characters in your mind and memorize things that you can later write down. Broad outlines of the story first, broad strokes of the characters, and maybe the scene.
If you don't have an arsenal of tricks with which to focus your attention, you are bound to -- as we all are -- to focus on your mind, your body, and your feelings. Put all that on hold and they will take care of themselves. Please forgive if this post is full of typos. I'm about tuckered in at this point and have to sleep.
I hope you have a good day, Mippy!