You need to go see a doctor if you dream in your sleep.  There are two major stages of sleep:　 REM and NREM:  REM, Rapid Eye Movement is the stage we dream. 

It is normal to have dreams in sleep but if your dreams are causing you more stress, you need to see a psychologist or someone who can help you identify your stressors and strategies to de-stress.

Take care of yourself!

Now let me use a metaphor:

we eat food then we poo poo; we use our brain while awake, then we have dreams while asleep.  It is  elimination to maintain balance of mind.  I know it sound yucky!