well dream symbolism is different for many people. If you dream of your dad i'm pretty sure Freud's books will say you fantasize about your dad
dreams are often triggered by your current life events or things that have been bothering you. Don't be surprised if they're not literally displayed in your dreams.
for example you could be having troubles with your parents and you could be having many pregnancy dreams or childhood dreams.
Or if you're having a hard time you could be having dreams of positive events as your subconscious is trying to find relief when in sleep mode.