losing it

No, I'm not going crazy. I think I'm slowly losing my creativity. Is there such a thing? Or maybe I'm just losing inspiration and motivation to be creative. I feel like stress at work is affecting my bouts of creativity, or lack thereof. I don't like this feeling at all! I hate not being able to have sudden bursts of 'A-ha!' moments in the middle of the night, or at any point of the day actually. I don't like this at all!