Could i have insomnia at 25wks??

I've been up literally ALL night was tired but couldn't go to sleep for the life of me? it's been this way for awhile im usually up to almost daylight some nights ughhh i don't know what to do i don't want to depend on unisom/Tylenol pm/benadryl to help (as i don't rely on it until my last trimester)...maybe I'll get some rest once my son is off to school hopefully before my 2yr old wakes up