Hi Hopelovely,
I do not know your age but when I was about 15 or 16 which was about 35 years ago I told my mother the same thing and she came back with oh you are fine just like your Mom has with you. I then told myself I have to figure it out on my own and I learned to mask everything. That is something you never want to do is mask your feelings. I suggest you go to a school counselor and let them know how you are feeling. For your Mom it could be denial it be the stigma or something else. Please seek some professional help of some kind and possibly you could start treating this depression if that is what they believe you may have right away. You do not want to go down the road many of us here have already traveled. I wish you the best you came on here so I know you have the courage to seek the help.