Obtained from
An Online Guide To Dream Interpretation......
Yelling
To dream that you or someone is yelling, represents repressed anger that need to be expressed. If you are yelling and no one hears, then it suggests that you are being ignored. You feel that your voice does not matter or that your opinion doesn't count.
Given the circumstances, I would say this makes sense. I'm not sure how much I believe this website but hey, it's all good to at least give some explanation to our dreams.