Is it just a dream?

I had a dream this morning.  It was scary how real it was.  I woke up clutching the blanket I was under.  I was panicked and disoriented.  It took a moment to realize where I was.  Once I gained my composure, I still could not calm down.  My heart continued to race.  The dream has me worried not because of how real it was.  It has me worried because it actually played out a possible upcoming event in my life.  The dream has me worried because the vision it portrayed was not something I want.  I am hoping I can use this dream as a forewarning and prevent a major disaster.