Sheikhana. I often feel afraid after conversations, questioning whether I have made a statement of kufr or unintentionally said something involving shirk. And sometimes I have doubts about whether I have engaged in الاستهزاء. How should I deal with this?

Ustadh AbdulAziz al-Haqqan

This is called waswas and the best way of dealing with it is to keep yourself busy and to ignore it.