About 6 months ago I finished my PhD and started a new postdoc at a prestigious lab at a prestigious university. I was very burned out as I completed my PhD, but I hoped starting fresh I'd find renewed enthusiasm.
However, things started bad and have just gotten worse. I like the university and city and would prefer to keep on for at least a full year, but I'm having a very difficult time concentrating on my work.
My poor performance stresses me almost more than anything else - after 6 months with little to show for myself, I'm afraid of leaving a bad track record. I feel that my postdoctoral advisers just think I'm confused or stupid, but in truth I'm having a terrible time making myself work.
I have trouble keeping my focus on journal articles and it takes me hours to write short to-do lists just because I keep getting distracted. During research related discussions I tend to "zone-out" and start questioning why I'm even there, totally losing the thread of the conversation.
I know that I am actually a capable mathematician and researcher. I'm not sure what's happened to me, but I know things can't continue like this.