What should a person who frequently experiences doubt do about their recurring doubt in their acts of worship and contracts, especially their doubt concerning the occurrence of divorce, and is he required to renew the marriage contract with his wife whom he has not yet consummated the marriage with?

The default is the soundness of the acts you have performed, such as Hajj, purification, and prayer, so do not pay attention to any sudden doubt concerning them. The default is the continuation of the marriage contract and the non-occurrence of divorce, so do not pay attention to delusions that may lead you to dangerous matters. Imam Al-Shafi'i stated that the divorce pronounced by someone whose mind is overwhelmed by nature or ailment (such as the imbecile, the insane, and the obsessive) is not binding on him, nor are prayer or prescribed punishments binding on him as long as his mind is overwhelmed. However, if he regains lucidity and divorces while lucid, then the divorce is binding on him.