Jyar,
I am so sorry you're going through this! I totally empathize with you. I've experienced something like this, dreaming (having nightmares) and in my dream screaming loudly in terror and then waking up covered in sweat, silently screaming (making no noise), which just, the switch from hearing this loud scream in my dream, to hearing nothing when I'm suddenly awake, just that is jarring and freaks me out. Then there's the nightmare, and the disruption of my sleep schedule, and it just all goes downhill from there.
Anyways... my guess is, for myself... that these dreams happen the most when I'm repressing my real feelings. When I'm trying to go through each day taking care of everyone else's needs and not my own. When I'm trying to act normal, like nothing's wrong. It's literally like a (scary ass) wake-up call that I need to spend some time taking care of myself and listening to myself.
So, yeah, I agree with FrancieMarie and Bubzilla. Sometimes you just have to embrace the darkness, wallow in the pain you're feeling, sit in the dirt that stains you. Because, I feel like, you can't possible resolve something you don't even understand. But, that being said... if you are going to pursue the darkness, setup some support first. Therapy, family, friends, make sure things are handled by someone else so you can take a little time alone. And I've recently found walking around outside, enjoying nature and staring at the sky works (it's not just crazy hippie new age crap, LOL! ;D) to just give yourself time to be and experience what you're actually thinking and feeling. Journaling also helps, sometimes you can be surprised what comes up on the page once you start.
Feel better and know you're not alone,
D