Kindly refer to the following link(s):
Do all sins make a person kafir (disbeliever)?
Am I a Kafir? Did I commit Kufr? Should I redo my Shahada?
How a person becomes a Kafir (OCD about kufr)
Confused, did I commit kufr or not? - Assim al hakeem
Waswas about mocking Islam so I keep repeating the Shahada, what should I do?
Have constant whispers of Satan, doubt my Islam & repeat shahadah a lot, what to do?
Have intrusive, kufr thoughts, can I just ignore them?
Is Boasting about Music or Songs one heard or saw Kufr?
People, who mock Islam, are they apostates? If we don't consider them apostates, are we disbelievers? not calling kafir a kafir
Father laughed at Son's way of saying 'Assalamu Alaykum' (due to poor Arabic), Is this Kufr?
Do things people say against Islam when angry make them kafir?
Will I be held accountable for hearing words of Kufr from a Muslim or a Kafir? (holy shi*, etc)