You have succeeded in recording some interesting sounds Will, and these should provide some of the SFX that you will need to tell your story. You'll also need to think about the background ambiences and environment noise that will play throughout your animatic - these 'beds' of sound will help the viewer suspend their disbelief and inhabit the world you are trying to create. Can you find a way to record the sound of heavy rain, for example? This could play in the background while your other SFX provides moments of synchronisation with the visuals, helping the sound to enhance the narrative.
Second year Sam needs you and your subconscious! See link:http://ucarochester-cgartsandanimation.blogspot.co.uk/2014/01/fao-everyone-sam-cgaa-year-2-niemczyk.html