I have thoughts like these as well...Especially those sudden thoughts of 'taking the leap' or other images that sometimes are so powerful I may have doubts whether I'm actually in the process of acting them out or not. But they're always just in my head (thankfully) and I'm actively trying to replace them any time they pop up, or make sure that someone watches me..!
About morbidity generally...That's a different thing. I have wished I could just die (without being suicidal). I have also believed I'd never be ready for death and therefore dreading it. Now...now I am happy in the knowledge that I will definitely die, and even happier about the fact that I can never possibly claim control over the details of that happening. I can never make a conscious, well-thought, or intellectual decision about death (making it happen or even truly wishing it). Once I got clear on that one, I felt more secure about it not happening 'accidentally' either, i.e. due to extensive 'brain misfires', because there would be a part of my brain that wouldn't let me act on that intensified death-drive. In a way, I'm rewiring my brain (or trying to!) in how to respond to its own disordered signals as it were.

I hope this makes some sense!

Hugs to all