Never be shy of repenting for a sin.
“Say: O ‘Ibaadi (My slaves) who have transgressed against themselves (by committing evil deeds and sins)! Despair not of the Mercy of Allaah, verily, Allaah forgives all sins. Truly, He is Oft‑Forgiving, Most Merciful”
[al-Zumar 39:53]
But indeed, I am the Perpetual Forgiver of whoever repents and believes and does righteousness and then continues in guidance.
[Surah Taha 20:82]
“And whoever does evil or wrongs himself but afterwards seeks Allaah’s forgiveness, he will find Allaah Oft‑Forgiving, Most Merciful”
[al-Nisa’ 4:110]
“Know they not that Allaah accepts repentance from His slaves and takes the Sadaqaat (alms, charity), and that Allaah Alone is the One Who forgives and accepts repentance, Most Merciful?”
[al-Tawbah 9:104]
Anas (radhiallahu anhu) said that he heard the Messenger of Allah (sallallahu alaihi wa-sallam) say: “Allah the Exalted said: “O son of Adam! As long as you invoke Me and plead to Me, I will forgive you whatever you have committed, and I will not make much of it. O son of Adam! If your evil deeds reach the borders of the sky, and then you ask Me for forgiveness, I will forgive you. O son of Adam! If you bring forth the earth full of errors, then you meet Me while you do not associate anything (or anyone) with Me, I will bring forth for you its full of forgiveness.” [At-Tirmidhee (Shaikh Albanee rendered it as Hasan)]