Here are some tips to control negative thinking:
Identify negative thoughts: First step is to recognize your negative thoughts and notice when they arise.
Reframe negative thoughts: Challenge negative thoughts with realistic and positive ones. For example, instead of thinking "I'm not good enough," try to reframe it as "I did my best."
Practice gratitude: Focus on the positive things in your life, such as the things you’re grateful for, and be thankful for them.
Mindfulness meditation: Practice mindfulness meditation to help you bring your attention to the present moment and quiet your mind.
Surround yourself with positivity: Surround yourself with positive people and read positive books to counteract negative thoughts.
Seek professional help: If negative thoughts persist, it is important to seek professional help, like seeing a therapist, who can help you develop coping skills and strategies to manage negative thoughts.