Ask HN: Prevent self doubt from affecting performance?

Been at this big tech company for almost a year with about 5 years exp. Since start to present, I’ve just felt like I’m drowning. It seems like almost every topic I encounter requires me to deep dive for a few days just to get the fundamentals down, which is hard in an environment that moves at rapid pace. Compounding into this turbulent economy, my anxiety is pretty sky high.

How have you guys dealt with this in the past? I’d like to add that I’m pretty motivated and spend a great deal of time studying and reading, but the mix of pressure, lacking knowledge and anxiety is really killing me right now.