It sounds kind of difficult for someone to know if they're Otherkin or not...

For me, it might be possible but again I'm not sure...

For one, I have dasa 'vu all of the time((I know I probably didn't spell it right sweatdrop ))

For another, I always feel like I'm not human, like I'm otherworldly. And everytime I think about it, I get this tingly sensation all over,especially my back.(( and it creeps me out neutral eek ))
On another note, I a lot of times think that all humans need to die whenever I see cruelty towards animals or the Earth. This sounds more evil than anything to most, but I guess it could sound somewhat good.
(( I watch animal planet too much gonk ))

And lastly I hear things like voices, and sometimes even screaming which really scares me. eek maybe I'm insane.maybe I need to go to the looonny-bin!

I don't know, I'm probably mental,but anyways that's pretty much it.