Ask HN: How to deal with impostor syndrome when you don't have tech degree?

I’m a software engineer at a well-known, respected company who has zero formal education in the field (my degree is in print journalism).

Before I got my current job, I had always been pretty tech-savvy, and had even done a little experimental programming and web design, but never took any classes or boot camps. A few years ago, during a 6-week stint on disability, I brushed up on my minimal skills and soon after managed to score a job writing code through a connection I had at the same company.

I had major impostor syndrome for a long time, though it somewhat helped that the projects I worked on had little close oversight or code review that might have revealed my lack of training. But after years of good performance reviews, successful projects, and promotions, I started to finally allow myself to believe that I knew what I was doing.

Now, though, the impostor syndrome is back. My management is pushing me towards leadership, and I’m having a hard time trusting that my ideas about software design are as valid as those of a student who’s taking the formal, higher-education classes that I never did.

Anyone else been in this situation anymore? Any thoughts or tips on how to deal with it?