[foolishdream]

That is the common link between this specific time you feel this way and all the other past times? You've exhausted all the potential external sources, so maybe it's time to look within. This may sound like voodoo, but there might be some internal source that is causing you to feel this very real sense of anxiety and stress. Before you go do something brash like quitting what seems like a dream gig, dedicate several months to check in with multiple psychologists to see if that doesn't help improve your malady first.