Is extreme fear of diseases, especially cancer, and lack of trust in God, despite committing to acts of worship such as reciting Surat Al-Baqarah, seeking forgiveness (Istighfar), and repeating the Hawqalah, considered a sin? And is it permissible to seek forgiveness and recite Surat Al-Baqarah with the intention of preserving health and well-being?

The questioner is not sinful for feeling fear, but she should take the necessary steps to overcome it. This includes reflecting on Allah's mercy towards His servants and that His management of a servant's affairs is better than the servant's management of their own. She should be content with Allah's decree and destiny, knowing that it is good, merciful, and wise. This will lead her to complete submission and surrender to Allah's judgment. She should also feel Allah's mercy and reflect on His attributes and blessings, and ward off fear by supplicating to Allah and striving in His obedience, as these are among the means of protection from tribulation. There is no harm in seeking forgiveness and reciting the Qur'an with the intention of warding off evil and tribulation.