Overpowering Emotions


I had a 20 min coaching call and I kind of broke down and had so many emotions come up inside me.
I did not think about the subject in particular that triggered the emotions, at least not consciously. Before the coaching call I had thought about steering the conversation differently, I felt as if my emotions swooped over me and after the coaching call I felt exhausted, surprised, and relieved.

When a feeling overpowers like this, what does that mean?