Got diagnosed with BPD, but I never found myself to be an impulsive person.

The most impulsive I've ever been was probably when I'd self-harm, which is an entirely separate criteria of BPD, and even that seems to have diminished. As in, I don't do it as badly as I used to because I think of how tiresome having to hide my body or give explanations is. So, as much as I want to slice up my arms or legs or whatever, I resort to doing one deep cut and lying that I jumped a fence or something.

Right now I'm struggling really bad with suicidal ideation and, well, I'd like to mix a bunch of prescription pills with alcohol. BUT I have a bunch of reasons I haven't done it yet. Because, if I fail, how do I get a new set of pills? And what if I get brain damage or something? Also, finals are approaching, so I instead of studying, I'll be in a hospital or at home, bed-bound and feeling like shit. 

I feel like I went into a bunch of detail for no reason at all, but basically I feel like I'm still too rational and not impulsive at all to fit the impulsivity criteria of BPD, which makes me question ny diagnosis altogether.

I do have thoughts about doing impulsive things like 24/7, but I never act on them as the rational side of my brain intervenes pretty quickly.