I wouldn't say it's a matter of confidence, but more about having this impulse that arises whenever a story comes your way, and you feel the need to give it a form, whether it is through drawing or writing.
But like someone said, I feel another awareness to the passing of time and that if I don't put it out there, my stories will never see the light of day and they will die with me. This is an idea that has been making me write again.