nightmare is just a nightmare. usually after got a nightmare i will take a shower and take positive activities so i can forget the nightmare. if j remember again will forget it quickly and eat any sweet snack and food

I dont know.... cry?

It's a sign there's something that's bothering your mind unconsciously. So try to figure ot out what it is and try to be at peace with it. Maybe you can change how you see it or deal with it right on.