I don't mean to offend anyone, but it's a fact that BPD had a huge hype some time ago and I feel like at some point everyone had it. 

I'm not doubting the fact that this truly exist, it is in the DSM-IV after all, but I'm wondering if anyone else have doubts about their diagnosis? Or even if after a while and some soul-searching, you feel like you don't have it anymore/probably never had it in the first place?

I'm not all about science, but I read some time ago that people with BPD have parts of the brain functioning differently, which could be proven with a scintigram, but yet they never give you one, why is that?