What is the interpretation of the return of some previous obsessive-compulsive whispers (waswas), albeit in a milder form, and why do the things I am wary of happen, and what is the Sharia's view on this condition?

All praise is due to Allah, who has blessed you with healing. We ask Him, the Exalted, to complete it. What you sometimes feel, regarding the fear of impurity returning from the toilet and the like, requires taking preventive measures and dealing with the matter as normal. The default is the purity of your clothes and body, so do not pay attention to anything contrary unless you are certain. If you are certain of impurity, purifying it is easy. Satan is keen on you remaining ill, and we advise you to continue following the previous instructions.