Why can't I sleep anymore?

Karen Ann • Happy. 25. Avoiding pregnancy. Single
For the last week my sleep has vanished... I'm wide awake I am not drinking caffeine just water, no sweets, I've had horrible anxiety lately !!! I'm wondering if this has anything to do with it? I bought some zquil and already ran out today & now I'm back to being restless, & I can't seem to find myself sleeping... 
I would do anything for one good night sleep at this point