To write or not to write?

I had this really vivid dream last night and I am kinda torn about something. I have always wanted to be an author. No matter what I chose to do in life, I always knew that I would want to be writing, as well. I can, however, honestly say, that I have never imagined myself writing a suspense or thriller type story. It is so not my strong point; I usually don't even choose to go see those kind of movies. But...my dream was so real and it almost told the whole story itself. That being said, I think it would make a really good story. Remembering my dream seems so much like watching a trailer for a great new movie. I want to see the rest of the story. I just question whether or not I have the talent in the thriller/suspense department to fill in the holes with good quality, interesting story. What to do? What to do?