Nicole, one of the best pieces of advice I was given was "fake it 'till you make it." We were all pretty miserable at the same point you are now, and "faking it" will actually have the effect of making you feel better. It's not always easy, and yes, there are absolutely going to be times where you are still miserable, but by changing the face you present to the world does actually make you feel better.
I agree with the other posters... you definitely need sleep. If you are having trouble, get some help for that.
M:23 T:26 Me:53, Wife: 60 S:18 D:16 filed 7/16 W moved out 4/28/17