Alexis, Indy gave you very good advice. I'll restate it, from the "professional" point of view.
Please see a therapist. Changing those internal dialogues is not an easy thing to do on your own.
As someone who has had to do a LOT of work changing those internal dialogues (and will likely always have to work at it), I concur with Crankin and Indy. Get someone to help you with this.