Are these wasawasa?
I often get bad distructive thoughts about Islam and Allah but I don’t deliberately think it as it just comes to my mind so I often tend to take the shahdah many times a day and i know I am saying it from the heart but my mind keeps telling me you haven’t said it correctly or you haven’t said this from the heart how do I stop this? And are these shaytan whispers?
Assalāmuʿalaykum Wa Raḥmatullāhi Wa Barakātuh
Yes, indeed, these are evil whispers from Shayṭān.
You may try taking the Shahadah once more with complete certainty, conviction, sincerity and in the best of ways, then make a note of it somewhere together with a date and time. The next time that you are challenged with these evil whispers, remind yourself of that time that you have taken the Shahādah with complete conviction and sincerity to assist in removing such doubts of not having taken the Shahādah properly.
Alternatively, each time you are challenged with such evil whispers then divert your attention from it and do not entertain it at all.