Q. I am 51 and have been diagnosed with chronic PTSD causing mental lapses and focus deficiency issues. I am considering a medical disability retirement, as I am having a very hard time doing contract administration work. I am a FERS employee, GS-09, with 14 years of federal service — 1½ in my current position. I need to look at my total potential income picture before I decide. I understand I will need to apply for Social Security when/if I apply for disability, but how does getting Social Security work with getting disability payments? Would I draw from both (assuming…