I was recently diagnosed and I never know if these things are bpd or I'm just overthinking it. I keep switching with just being okay, to slowly getting so upset over stupid shit that wouldn't even matter at all to a normal person. And yet here I am. It starts off slowly with me just feeling sad again over the silliest shit, until it makes me kinda wanna die, or do other things like cut. Then I'll snap out of it and be okay, realizing I freaked out. Then going back to being depressed/hopeless/suicidal later.