*hugs* First of all, I know how you feel.. I've had similar feelings before.
My best advice would be to budget your time. When you feel like you don't have time to do everything, sit down and write down all the things you need to do, then give each one a time to do it in. Like, one day you do some cleaning in your room after studying for you test, the next day you work out before going to work. That kind of thing. If you do do this, make sure to write it down.. not only does it help you figure it out, but if it's tangible, like on a piece of paper, it's more likely you'll stick with it.
I hope you figure it out, and I hope this helps. If you ever need to talk, everyone here is here for you.. and feel free to PM me if you ever want to.
~Fae