Depersonalization was a problem for me for many years. It usually coincided with Derealization Disorder.

I honestly can't say when it stopped, but I am much better today and only find myself "driving the car like I'm sitting in the back seat" when I am under enormous stress.

I also had trouble with body distortions. Like my left ankle would be swollen to twice it's size but only to me.

But I guess that could've been the BDD too, which is better now as well. (Body Dysmorphic Disorder)

Depersonalization Disorder - a feeling that your body is unreal, changing or dissolving. Strong feelings that you are detached from your body.

Derealization Disorder - an alteration in the perception or experience of the external world so that it seems strange or unreal.