Is anything incumbent upon me after a paper not bearing the name of Allah fell from me onto papers that had the name of Allah the Almighty, and that was not done with the intention of disrespect?

Papers containing the name of Allah are revered and should only be discarded in a suitable place. However, placing ordinary papers on top of papers containing the name of Allah is not considered apostasy unless one intends disrespect. Disbelief only occurs through the deliberate act of kufr, such as prostrating to an idol or throwing a Mus'haf into filth.