Intention for fasting

Concerning an imaam of a Hanafee masjid who mentioned to his congregation that he has a book in which it mentions – if the intention for the fasts of Ramadhaan are not made before the last appointed time for the ‘Ishaa [prayer] or [even] after it or at the time of suhoor (the pre-dawn meal), then there is no reward for his fast. So is this correct or not?

Too shy to tell my mother I had started my menses

I am a young woman and my menses began when I was 14 years [of age], and I was too shy to tell my mother about it. So after Ramadhaan I did not make up [the fasts] which I was required to, bearing in mind that this was 11 years ago, so what is the ruling regarding that considering I am now married?