Insomnia

I have problem sleeping. I slept at 7am yesterday and woke up at 11am. I only slept for like 4hrs ? And i went out at 12pm and reached home at 11plus. I'm outside the whole feeling tired but the moment I lie down on my bed I can't sleep . I'm tired and sleepy but I just can't sleep. Omg this feeling suck. 

I don't know what to do. I wanna sleep .....