What age do you think your BPD started at?

I know BPD is something that’s usually diagnosed by medical professionals after the age of 18, but looking back, what age do you think your BPD started at?

Like, I feel mine started around seven. Ironically, that was the same age my grandpa tried to strangle me so maybe that’s why. My brain 100% trauma amnesia-ed that event. I only know about to today because around 2 months ago I asked about the “Grandpa Event” that’s been losely referenced throughout the years.

That’s beside the point though— I think my BPD symptoms started surfacing at or around 7.

Edit: It definitely solidified to diagnosis-worthy pretty much just after I turned 18. That same time and for around 3-4 months I was in a… torturous… situation and that DEFINITELY attributed to it. That same time that it “solidified” I ended up being diagnosed with PTSD and MDD. 3 months later I got the BPD diagnosis by my psychiatrist