can't sleep in the morning or afternoon at all !!!!!! HELP!!

Ive been having insomnia since December 2016 and since then I have not been able to take a nap or sleep in the morning or afternoon at all. what could this be? In December I was having panick attacks and anxiety that was causing my insomnia but after it went away my insomnia is still here.im currently taking sertraline and saphris (antipsychotic medication) that helps with sleep.