Can a dream have a subliminal message?

I've been interested in the iPhone 6 for awhile and have been researching it non-stop (phone features, and leaked pictures). I have just been thinking about it a lot in general. A few weeks ago I had a bad dream that included the iPhone 6. In this dream I got a text that included bad news about a family member dying or getting hurt. So my question is can this dream be a sign of anything? Or am I crazy and over thinking?

Personally I don't think dreams mean anything really; it's just your brain mostly wandering about your hopes, fears, or stuff you think about a lot, and then random stuff.