The internal dysregulation comment was speaking of BPD subtypes and where I align on that (which are not diagnoses themselves, but simply different borderliner symptom combinations that are widely acknowledged).

So you can have BPD’ers with a more petulant presentation of symptoms, for example. They’re more external, more likely to explode on others when they get dysregulated, and are typically quicker to get diagnosed with BPD in large-part because of this. And then there’s the more “discouraged”/“quiet” borderliners like myself, who instead of lashing out at others, we will turn our dysregulation inward, and be extremely internally chaotic, even if the people around us would never be able to guess as much.

Quiet BPD is pretty easy to misdiagnose as StPD or AvPD, especially in StPD’s case, as there’s psychotic-adjacent features of BPD that are less talked about. Especially in regards to both disorders tendency to kind of assign a negative and Matrix-like moral character to “the universe”, which you’ll sometimes see described as a “schizotypal worldview”, tho it’s in no ways exclusive to StPD. And interpersonal distress can trigger psychotic-like episodes as well, which can also confuse people into percieving someone’s condition as more schizophrenia-spectrum than it really is. And it’s common for pseudo-psychotic features to be most pronounced in borderliners when they’re left alone. Like, for example, it’s pretty typical for a BPD’er to have subclinical paranoid delusions about being watched that completely go away when placed with somebody they trust, and a lot of that comes from the borderliner brain struggling to contextualize it’s own existence without being perceived, so the brain lowk minorly hallucinates to hold you together, tho some level of insight is typically maintained… and I’m sure you can see why that’s a pretty StPD-like trait which can still be explained with BPD.

So yeah Autism + Quiet BPD can present very schizotypally.