One day I was running late and decided to face my fear.
What fear did you decide to face?
My fear of talking to people on the phone. I called my boss and told him I'd be late.
It was irresponsible of you to be late but I commend you on facing your fear of speaking. Keep calling people and this fear will lose power over time.
I don't want to give up operating on my own schedule so I think I'm going to change jobs since my boss can't handle my tardiness.
Getting a new job won't resolve your issues with being tardy. You will have to take responsibility in this area and follow your employer work schedule or face getting fired everywhere you work.