The checkout is down. Your project manager is breathing down your neck. Someone is reminding you that you're a certified developer with "how many years of experience" and that you should be able to get this fixed, quickly.
We, ecommerce developers face real, intense pressure. We have to keep the site up. We have to fix problems quickly. We have to prevent bugs from getting into the system. I feel this all the time (and I'm guessing you have too). Through the course of my 10-15 years as an ecommerce developer, I've picked up tools and ideas that have reduced that feeling of stress. These have put me in the driver's seat in (most) situations. Yes, there are still those crazy-weird problems, but that number is constantly decreasing. The Art of Ecommerce Debugging is where I give my learnings to you to make your load lighter.