I have struggled with doubt for much of my life. And it snowballed in the last 4-5 years. When you're full of doubt, everything is difficult.
There is a simple solution: hijack your emotions.
Do something daily that makes you more confident. Work daily on something that makes you feel like you're getting better. Don't let your hopes fade. On the contrary, make them stronger every day.

Great truths that cannot be easily hidden. The many problems bring doubts and negative thoughts that become constant and disturb you to concentrate on new activities.

Daily action on something useful will lead us on the path of confidence and security to overcome difficulties. Problems are like a constant variable in life, but creating a climate of self-confidence will help us to activate ourselves and believe that we can overcome difficulties.

I am glad that you continue to write your publications despite the constant struggles and doubts that may come your way. Success, my friend.