I too have experienced what you are experiencing now... but have faith, my friend, it will pass. What I have found valuable in such situations (in addition to the sound advice offered by others here) is to turn to the philosophical aspects of aikido and immerse myself there for a while i.e. reading/rereading the works that inspire me. Practicing with the soul instead of the body for a while... this always works for me. In addition, like stated above, perhaps a little cross-training (if you **need** a physical meditation)... Personally, in such circumstances, I find European fencing a good match to supplement aikido... good for timing and distance training.
I wouldn't worry too much... just keep the faith and the cycle will change soon..