Is it possible to develop BPD and not have any childhood trauma? Or maybe I can’t remember it? All I really remember from birth til about 18 is about a small handful of happy memories with family and a few bad memories Like getting in a yelling fight with my high school boyfriend or sisters fighting. I have a really really bad memory. I always feel like I suppressed my memories for a reason. Also, My identical twin sister (34F) told me something bad happened to her as a child and that my mom would always give us dimetapp at night. I do remember her doing that a lot. If nothing happened to me grammatically as a child how did I develop BPD? 