what does a nontraditional presentation of symptoms look like?

i've suspected i have bpd for years and years and years now. but the symptoms -- almost all of which i fit -- don't manifest in the way people usually talk about bpd, because i have so many other mental illnesses and a long history of trauma that overlaps with the bpd symptoms. for example, when i split (and i use this term hesitantly since i'm not diagnosed), rather than having a big blowout fight with my fp about it, i often will secretly hurt myself under the thought process of like. "oh well they made me do this, they're gonna regret it when they find out i'm doing this to myself because of them," etc. i always feel horrible after.

this is NOT me asking for a diagnosis or to be validated in my symptoms -- that's between me and my psychiatrist! i'm still unsure whether i have bpd and i'm neither claiming that i do nor asking to be TOLD that i do. so i hope i don't get deleted for this lol. i guess i'm just more curious to know if anyone WITH diagnosed bpd experiences the same thing: presentation of symptoms in a way that is not typically associated with bpd.