Yesterday night, pushed code that work normally to prod server, website down, internal server error, too many connection to MySQL server, tried to fix it for 4 hours, nothing to do, removed the new code, still the same problem, in my head, I told myself that I'm not good at programming (not the first time), send an email to the host, they tell me the problem is from them and they fixed it. And now I know I'm not bad enough.