That is right! I am doing a sequel to Forgiven, which is called Asunder. The story follows Tris after the events of Forgiven (the epilogue of Forgiven is not canon in this situation). Here is a preview:

Darkness. It surrounds me and waits to attack. I stare into nothingness and then pain rushes through me. It feels as if poison was injected into my bloodstream. I could sense my skin ripping violently and my lungs collapsing on itself and filling with liquid. I scream, but the cries cannot be heard. I scream again and I realize that it's useless. A burning sensation begins at my my chest and spreads throughout my body. I can here him call for me. But all I here is a gunshot and he stops.

My eyes flip open violently and I scream. Tobias wakes beside me. He gathers me in his arms and tells me it's a dream. I cry into his chest and we fall asleep in each other's arms.

It's been like this for several months now after I went through those tests and trials. I can feel myself still apart of that world, even though I left it so long ago. If I told anyone, they would think I'm crazy, but I'm not.