Dream............ i hardly believe on it. Because if dream is bad it annoys you and if its good we expect that our dream will come true and it also annoys a lot
I don't believe that dreaming affects how tired you are during the day OP. Some of my best and energetic days are when I've had a nightlong dream
it is said that every night we are dreaming 10 times or more but only 1-2 of it you remember when you awake