For one, I think it's natural but if it gets extreme, then it's destructive to everyone. It's great that you were able to refrain from causing damage. That's good self control.

The other thing is that we can learn how to handle our emotions so they don't cause negative thoughts.
I've been trying to do Dialectical Behavior Therapy for Bipolar. It's an awesome book but obviously it's hard to learn. Maybe you can check it out.