Ptsd, A Divorce Virus

I suffer from PTSD (combat stress related) and am not making it easy on my wife. I am getting help, but its just not working fast enough. I apparently have made my wife unhappy and am prepared to let her go for her happiness...to free her from my problems. She is a good women and great mother to 3 biological boys, ages 19, 24, and 26. In November of 2008, we (my wife and I) were called upon to watch over a family sibling who was removed from my niece's care by CPS. We ended up adopting him in May. In February 2011, another child was born from the same mother, my niece. CPS again removed the child from her care and we openly took her in. Its been very stressful along with my PTSD matters, but we mean to do well in ensuring the siblings stay together. My wife, however, has reached the point to ask for a divorce. As much as I don't want to go that route. I believe its a matter of time. She has made it clear that I should take custody of the children. I will do whatever it takes to raise them. I wish I could convince my wife to reconsider, but our last marriage consultant said I needed to get fixed before I could work on my marriage. Well....its not that easy and I believe my wife gave up. I have had suicide ideations, but my adopted children have kept me alive. They are great to watch grow. I am so very sorry I have caused our marriage to end. Help is out there for us soldiers but everything is by appointment only. I know I am not alone on this. Sure does feel like it though. I can't find daytime employment, because no one wants to hire someone that goes to therapy twice a week. I work graveyard and only see my wife for two hours a day and weekends. Almost like being deployed while at home. I really not in the best of health to work but I do need to feed my family.