Nowadays.. i have sleep problem.. it can last continuously for days.

For example, i can be very tired and went to sleep at 11.30 pm then somewhat wake up at 3-4 am. Not really 100% wake up la.. much more like i am no longer in deep sleep stage, and i am just lying on the bed with my eyes closed then rolling here and there trying to get back to sleep.

This somewhat caused more fatigue to me and i got very tired for whole day the next day, It happened very frequently though..

I think it's due to stress or excitement. but how can i solve this?

Thank you