Sami, what you said in your post on your other thread makes a lot of sense; that you feel better when you talk about things.
Your mom says 'stop it', but you need to talk about it to feel better. This is about what you feel and what you need. Tell her that it makes you feel better to talk about things and that you would like to have someone to talk with about how you feel. Just like when you go to the doctor for a sore throat: it might be minor and need nothing done, or it might be more and need treatment. But you still go and see what's up. Maybe you and your mom could agree to a few visits to see how things go, then take it from there?
A school counselor might be able to help you and/or help you with getting your mom to understand what you need.
Keep us posted and best wishes to you!
ECHOES