This is how you can try to solve your doubts and negative thoughts.

Sit calm, try to postpone those thoughts for a day.

Do those thoughts still lingering?

Sit down for a reflection and ask these questions.

"Why are these thoughts popping up?"

"What was the trigger?"

"Is this really something important?"

"How do I solve this? What are the solutions" (not get rid)

Asking these questions will bring better clarity.

Try it.