Sometimes these minor problems gets in our way and its frustrating especially when you have a very important thing to do. But what you have done is the right thing because you didn't let the problem go over your head but instead you remain cool. When we encounter problems that makes us frustrated, I think the best way to do is to distract yourself, step back, put yourself into perspective and do something productive for a while.

And I like your mindset that you treat every issues, problem and obstacles as a test that God gave to you in which you can handle. God has always a plan for us.