Do the thoughts that come to me, which make me doubt my religion, such as associating the passing of wind while listening to the Quran or to Dhikr with mocking it, necessitate my uttering the two testimonies (Shahadatayn) to avoid being considered outside the fold of Islam? And what should I do about these whispers (Waswas)?

You are afflicted with Waswasa (whispers of Satan), and Shaytan has gained dominance over you through it. You must cast away these whispers and pay no attention to them, and seek refuge with Allah from Shaytan. These whispers and thoughts do not affect your faith, and you are upon the religion of Islam. So, continue with your acts of worship and strive against these whispers.