In my opinion, your mother really shouldn't have been saying those things. Especially if you need a dog, or something else of that sort.
I stand with Unknown that your mom is a bigot. I don't like it when people say things like that. It is insensitive toward the person that is being the subject of the bigotry (in this case, you) even if it is something that would help you to live a normal life.
It leaves me dumbfounded that a mother could, or would even say something mean and hurtful like that to their child.
_________________
¯\_(ツ)_/¯