While this won't be an answer in full to your question about consequences in the afterlife, couple items for thought based on my experiences from both ends of the spectrum:
First, my brother committed suicide little over three years ago now, and we still believe he is hovering around (best way I can describe it). Couple of random events, some dreams from folks, there is just something not 100% 'complete' there. One of the dreams he was found telling a person that he wasn't done yet, he had things to do, and he could not go. The person who had this particular dream, was actually not close to him, she married a good friend of his after his death.
Now, its up to interpretation if these are manifestations of imagination from the people experiencing them, but all the same, there is a strong feeling of truth that rings inside me. Just to let you know, my perspective of the situation is far from grieving for him, I am sad at times that he does not get to experience this cycle of life right now and that I do not get to experience it with him at this moment, but I am at peace with the events, knowing he will be back again some day to experience the physical all over, hopefully with more joy.
So there seems to be in his case, a possible incompleteness to his suicide, that he is not completely free from his attachments here.
The second offering I have, is from the perspective of surviving the period of time where I was suicidal. I probably spent over a decade residing in a world of self created pain and lack of want to continue. Essentially a third of my life wishing I did not exist any longer. Purely by changing my thought patterns, I am now in a state of happiness I could have never imagined during my depression. This was not an overnight change by any means, and it was not from medications (although i will say they have their place to help bring some people to a better place to make sound decisions). I have spent more of my adult life depressed then happy, but knowing what I do now, I am entirely glad I chose to continue to experience this life. While I would never wish the feelings on anyone that create the lack of energy to continue living, I am thankful for where they have brought me, and how much more I appreciate my current state. I am stronger because of it, and proud that even though I was not aware of it at the time, I ended up chosing to battle my mental demons.
As much as I blamed my state on others, my family, my friends (or lack there of), my fiance at the time, my finances, my inherited mental problems (my mothers side of the family has a long history of bipolar disorder)......even though I am happy now, none of those factors I blamed before has changed. My family is still not supportive, I am still with my now husband (although our relationship is very different), and I still have the genetic predisposition for mental imbalance. The only component that has changed in all this is me.
You are the thoughts you run through your mind, and you have 100% control of those thoughts even if you are not aware of it. Even if it feels like you have no choice, you truly do.
I send you joy and peace....and hope.