You can't just self diagnose insomnia
Insomnia is the inability to sleep. I went to bed at 10pm on thursday and woke up at 11pm, unable to fall back. I went to bed at 7pm on friday and woke up 7:30pm, unable to fall back asleep. I went to bed yesterday at 11pm and woke up 1am, unable to fall back asleep. If that is not an inability to sleep, I don't know what is.