Personality Disorders Support Group
Personality disorders form a class of mental disorders that are characterized by long-lasting rigid patterns of thought and behaviour. Personality disorders are seen by the American Psychiatric Association as an enduring pattern of inner experience and behavior that deviates markedly from the expectations of the culture of the individual who exhibits it.
I haven't been diagnosed with BPD yet - I actually just found out about it - and the more I read the more I feel like that's what I've been struggling with my entire life.... so I'm sorry that my answer is weak - but I'm just feeling around in the dark..... is that at all how you're feeling with the negative thoughts?