Hi hope you are doing well. These questions that you get are usually called existential questions where a person question's own existence. This usually happens repeatedly and with higher intensity if there are other issues you are facing in life for eg - financial, familial, or relationship issues. When these symptoms start affecting your social and occupational functioning then it's time you visit a psychiatrist and take expert opinion. Take care

These are good but if they are leading to distress an impairing ur daily life definitely u need professional advice any stressful event happened recently