At 10 days off effexor your body is still recovering. This will pass as the drug gets out of your system. Try to stay in a routine as best you can, especially at night. Stay sleeping at night and if you have naps during the day make sure they are after a definite wake up time.

The more I sleep, the lower I get. Its hard to stay up but I force myself, even if it be just sitting on the couch on the laptop. Fatigue is awful, so give yourself credit for each thing you get through and manage to achieve.