Cats will bite you if they get too stimulated. So if you're petting or cuddling your kitten more than it likes, it might be too much for it. Cats can't talk so they do what they can to communicate. The crying probably just means that it doesn't like you much at the moment.
It might have something to do with living in Toronto. Toronto is a huge glass city in the middle of a bird migration path so maybe all the birds flying into windows is freaking out your cat. Cheers!