Willow I hate when that happens to me. Usually when I have an extended period of time off from work is when I experience sleepless nights. Then it makes me sleep during the day hours and totally messes up my sleep pattern. What I usually end of doing is forcing myself to stay up in order to get my sleep pattern turned back around. It is a miserable process. I'm very sorry you are experiencing this right now.
As far as goals maybe you can just start small. Like make the goal to turn your sleeping pattern around. Set a goal to stay out of your bed for a certain amount of time each day. For me I usually set up little goals to accomplish around my house. Like sort out a certain closet. Rearrange my bedroom. Wash all my bedding. Wash all my coats and laundry. Just small goals that accomplish something I needed to do and that gets me up and active. It might sound silly but when I get super depressed and don't feel like moving an inch this really helps me. Even small stuff like setting the goal to shower and wash my hair and shave my legs. To a "normal" person this is automatic. But to a seriously depressed person these tasks are extremely hard to accomplish. But I force myself and finally I am able to get back on track. This works for me. I hope and pray that you'll be able to find something that works for you. Hang in there!