What should I do when I feel doubt towards those around me and sometimes towards myself?

These thoughts and whispers are from the wiles of Satan, and his wiles are weak. Therefore, you must seek refuge in Allah from them and completely disregard them. Be cautious lest they settle in the heart, causing psychological illnesses or ill thoughts. We advise you to maintain acts of obedience, avoid sins, and recite the morning and evening remembrances so that you may be under the protection of Allah.