I'm tired quite often, but I'm not sure if it's C-PTSD, depression, medication, or just not sleeping well. (I'm a bit of an insomniac with severe delayed sleep phase disorder) so who knows?
Most of my childhood and a good portion of my life up thru high school is a blank. Honestly, I'm a bit grateful for that -- I have enough fodder for flashbacks as it is. Starting at about age 34, my memory has gotten progressively worse, and I've lost even more details of things that have occurred since then - even of the good stuff. Sadly, memory specialists are really expensive and not covered by my insurance, so I'm just resigning myself to it. I can't say if that's due to effects of C-PTSD or something else.
Either way, it wouldn't surprise me if C-PTSD was the cause of either of these things.