I know its difficult to recall if you have yawned in your dream. The best way to remember a dream is to write down everything as soon as you wake up. Begin at the start of your dream and write as much as you can remember.
Yawning in a dream means you have to be careful in your activities in waking life. The yawn represents knowledge that people are playing boring psychological games. The yawn is a signal to tell you to wake up.
