Sounds like a massive case of 'Saccharomyces cerevisiae'. There's no hope!!!!
Just kidding. Mold likes to grow on top, not the sides or the bottom. It also likes turning green, white, and fuzzy. It will also smell NASTY. It's probably just trub or yeast particles floating in the suspension. A picture would help us tell if it is infected, if it will easy your worries.