well it sounds to me like your having more dissociative problems then dp ones. Dissociation is when you dont recognize yourself in the mirror and such, and when you can't remember whether you actually did something or only thought you did. But yeah just try to distract yourself as much as possible, i use to obsess over the exact same things which caused my derealization, but after i accepted my thoughts I got over it. Even if things seem weird as they are just think to yourself "these things aren't weird, my perception OF them is just weird, nothing has changed" thats how I delt with it anyway. Wellp I hope you get better man, take it easy.