My brother wet the bed until he was a teenager.....and even at 28, it happens on the odd occasion. He doesn't have PTSD, but his pdoc suspects he has PDD, or pervasive developmental disorder (along with bipolar diagnosis and ADHD.....) which is basically being quite immature and not socially/emotionally developed as he should be for his age.....
It was/is terribly embarrassing for him....so I understand how you might feel about it, PTSD!
I always wait too long to go because I hate to interrupt what I am doing to go potty so sometimes I have small leaks.....I should learn to just go when I have to!