Hi,
There is no inherent meaning to dreams.
Dreams are dreamt to do a certain tskduring the sleep.
Your dream was dreamt to wake you up and move you from a bad sleeping possition, also to drag you out of an unpleasant stream of thoughts of inferiority that makes you less important than your friends.
You were sleeping on your back when the dream happened and this is the worst sleeping psition for causing breathing difficulties during sleep.