how do i go about switching pill time?

hey so i just started taking 60mg of prozac and i take it at 6pm but im not sleeping so well… ill wake up and be wide awake at like 3am so i was thinking i should take them in the morning when i wake up… has anyone else ever had this problem? regardless i took them last night at 6pm and it is currently 9am can i take them now or should i wait a whole 24 hours?