The Valley of Death, and Too Little, Too Late

Something has been on my mind lately...
My cousin Bekah, recently talked about a sermon her pastor preached, and it has stuck with me, a little bug in my ear.
The sermon was on "the valley of the shadow of death". He talked about how the verse says "though I walk through the valley of the shadow of death". That means we keep moving through. So many people set up camp in that valley, praying "God give us peace to be content where we are!" and God's looking at them saying "Why are you staying there? You are supposed to keep moving!"
I myself am guilty of this. I have realized I tend to dwell on the difficult things in life for far too long, and not letting them go and moving on. In many cases, this is the wrong thing to do.
What about when you have tried to move on though? What about when it feels wrong to move on, and you don't want to?
I can't go back, but I can't move on. I feel like right now I'm stuck in a tar pit in the middle of the valley of death. Something is keeping me from moving on. Something doesn't feel right about moving on.
So what do I do?
There are some things I will be able to move on from, even if the affects still linger. From these things, I have consciously made a decision to let them go.
From one thing however, I cannot. Even when it seems like I should.
I was trying too hard to move on from it, and got snapped back like a rubber band, and boy did that snap hurt, because when I finally got back to where I was supposed to be, that rubber band broke and left me stranded.
Too little, too late.
I was an idiot who didn't realize where she was supposed to be until too late.
I misinterpreted what God had told me, putting my own human limits on it to make it easier to comprehend. I overstepped my bounds by placing those limits on it. I made a huge mistake.
One that I may have to live with for the rest of my life,  being stuck here where I am. I really hope not. By the grace of God maybe someday there will be a way out, but until then I'm stuck here.....
And it sucks.
Satan is definitely using it to his advantage, for sure. Using it to distract me, taunt me, torture me.
What could have been? What might have been?
If only I had understood sooner.....
To little... Too late.....