Hey all. So I have been diagnosed w BPD but one of the criteria that I was always adamant about never fitting me was the whole dissociating thing. I always had this preconceived notion that dissociation was this super strong out of body feeling (which I have experienced a few times in my life). 
Recently I have heard people talk about dissociation also as being like you're constantly daydreaming. It's really hard to tell, but seeing it from this perspective I honestly think that it's been such a normal thing to me that I didn't even realize that I had been doing it this whole time.
Whenever I was in high school I was misdiagnosed with ADHD because I had told my psychiatrist at the time that I was having a really hard time focusing in school during lessons and reading books in general. I still struggle with attention problems to this day and even during everyday conversations or situations I find it extremely hard to stay in the moment. It seems like unless something extremely gripping or attention demanding is going on, my mind is literally always wandering off and it's extremely hard for me to even notice it. It seems reflexive, almost like how people will immediately reach to scratch an itch without even noticing that they just did it.