I highly recommend you listen to those around you that take a break from this work. Continuously subjecting yourself to triggering stories can cause your PTSD to strengthen its hold on you. I know this first hand and have also lost a dear friend to exactly your situation. The internal terror of trying to help others before he was fully healed was too much for him to bear in the end. I would hate to see this happen to anyone else. Sexual abuse on the level you are dealing with is extremely intense. Maybe you can step back and handle more administrative duties until you have given your brain a break.

God bless you for all you have been through and done to help others. You are brave.