I'm literally one junior developer building a front end stack for a company that uses the waterfall method of building shit...

My application has not been fully tested and none of the real user base has actually tested it. I have no clue what potential egde cases exist in my application. I did as much testing as possible but it's keeping me on edge that there is potentially something broken lurking underneath that I don't know about.

If it is broken it's all erupting into flames and there's nothing I can do about it because the application will have to go through a whole beuacratic process to allowed to be fixed.