Forgetting the memorized Qur'an

Q 1: I memorized the entire Qur'an when I was nine years old. I learned it with Tajwid (reciting the Qur'an following the rules of recitation) and studied its rulings and continued to recite and revise it regularly. Then, after a long period of negligence, I forgot many portions of it. Allah blessed me with a job here and I was able to perform Hajj. Upon my return, I started memorizing the Qur'an again. All praise be to Allah, I am about to finish memorizing half of the Qur'an with Tajwid. Will I incur a sin for the period during which I was negligent of the Qur'an?

A: If the reality is as you mentioned, there is no sin on you.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.