well done for asking for help
you shouldn't be ashamed. true, its not a great thing, but you shouldn't be ashamed of turning to something you know.
you're mother obviously didn't notice the importance of what you were saying to her, but if you make her see thats its important you to, it should be important to her.
ive been where you are now. im not perfect, but im much better.
i realized, if my friends/parents loved me, they would never ignore or belittle what i was doing.
theres no guarantee you'll never do it again, but having someone (if only just to sit with in silence) helps get you through the ruff patch til you can see past all the hurt. and makes you all closer for it.