If you are describing and recalling scenes and events in a dream which you had, past tense should be used. If you say " I have a dream", it would mean something entirely different.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
The answers you have received are correct, but it is a common device in literature and drama to use the present continuous to describe dreams, or a scene being vividly remembered. This is done to heighten the feeling of reliving the dream or event being described.