ANSWER:

Do not let her taunts make you doubt the authentic things. 

Be respectful towards her all the time while strictly adhering to the Quran and the authentic sunnah.

Now as i m learning that we should not celebrate mild un nabi ,not do fatiha of food etc.i tell my mother these things she listen these silently then if i dont cover my head when the azaan calls or some situations she taunts like this is also not permissible ,she says someone is playing with your mind , everything is not permissible in islam then what should we do etc etc.what should i do in this cas