How do you tell if you have insomnia?

You don't sleep.: Some people have sleep onset insomnia (they can't fall asleep). Some have sleep maintenance insomnia (they fall asleep, but can't stay asleep), and some have a combination of both. If you're not sure if you're awake at night, then you're probably sleeping and don't have insomnia. If you are not getting adequate rest when sleeping, you might have obstructive sleep apnea or some other problem.

Insomnia: There is acute insomnia or chronic insomnia, acute insomnia is less than 3 months and chronic is more than 3 to 6 months please identify the stressor that caused this, it could be move to a different time zone, financial, relation stress etc. Google sleep hygiene you may need short term meds like ambien cognitive behavior therapy for insomnia works best according to studies.