What is the way to get rid of severe pangs of conscience resulting from speaking and then regretting it, and the desire to conceal problems and weaknesses from others?

The prophetic supplication "O Allah, I seek refuge in You from anxiety and sorrow..." is recommended, as is abundant salawat (sending blessings) upon the Prophet, peace and blessings be upon him, for the sufficiency of worries and the forgiveness of sins. Guarding the tongue is obligatory, but what the questioner is experiencing is often not forbidden speech; rather, it is a symptom of psychological distress or "negative self-talk" which might be from Satan's sorrow-inducing whispers to discourage the servant. To get rid of this state, it is recommended to seek refuge (in Allah), perform ablution, pray two rak'ahs, imagine a supportive person or advise oneself in a positive manner, mock the negative thought, and rationally discuss self-flagellating thoughts. We should not be harsh on ourselves, and Allah is Merciful.