Of course you are probably experiencing 'rebound effects' (aka 'withdrawal') from stopping taking your medication.

It might well be the case that in a couple weeks time your sleep cycle will return to normal and you will be sleeping okay medication free! (thats what happened for me).

In the meantime...

Limit caffine...
Exercise during the day...
Progressive muscle relaxation exercises...
Warm bath and warm caffene free drink just before bed...
MAKE yourself get up in the morning so it is easier to get to sleep at night...