Yes, sometimes it can feel like the life of you has been drained, I have struggled with that myself. You just had a big change though with leaving the job routine, PTSD doesn't like change, it takes longer to adjust, remember it's normal for a person not to like change, the PTSD tends to magnify normal reactions so they feel bigger/harder. Take it easy ok? You can do the paperwork, just give yourself some time. If you can push yourself to take walks it helps, even if you just start with short walks. Make sure you eat healthy even if you are not hungry.