Well clearly you need to work on your dream recall first.
Waking up in the middle of the night and writing down a complete dream(s)can be difficult but you do not need to write the entire dream. I found that just writing a sentence or two about your dream will help you recall the entire dream in the morning. I have recalled entire dreams from just a few words. Another alternative is to use a tape recorder. Check out the Big Remembering your dreams sticky topicfor more suggestions.