First of all, what GP's have adequate knowledge let alone training in personality disorders? An incredibly small percentage. It sounded like he was just spewing misinformation - that's a common problem with GP's. I find that unless you see one in an affluent area or go privately, they can not only be useless - but actually dangerous.

Anyway, only you can really know your own symptoms. Personality disorders involve long term patterns of specific behaviour...so the criteria for diagnosis is usually high. There are a variety of treatments that will best suited depending on what's most troubling for you - because it's different for everyone despite the some of the more commonly shared issues. For some people their most immediate problem is the impulsive/reckless traits that lead to addiction, relationship break ups, career breakdowns etc. For others it's more a concern over mood fluctuations and how to cope with the affect this has on all aspects of life. One thing i would say is that depressive traits are common among a lot of sufferers. I could go on but really the only advice we can give you is to keep going in your search for answers while we try and support you as best we can in the process.

Seek out those who properly qualified, be honest about what are your biggest concerns, and keep striving for the correct treatment for you, not something that's worked for others. All the best.