Hmm, i dont know if the lact of work motivation is actually OCD but if you really think it is, the best thing you can do is resist all the other Obessions like washing hands. In my experince with treating my own OCD and OCPD, ive found that as soon as you treat the diffrent symptoms, every symptom will slowing weaken off until it is not even a thought or worry.
Have you been diagnosed with depression? The lack of energy/motivation may be attributed to deprresion.
Good Luck