Is there something wrong with me?

Recently i have had this feeling that some... invisible person/thing has been just following me or watching me. i am not crazy though, ive gone through depression, but i have already gotten that under my control. i feel like someone is behind me, but when i look, nothing is there. but it doesnt feel threatening. accually a little comforting. maybe a mind trick because im alone at home most of the time? i know nothing is there....atleast i think so. its like if somthing were there i wish i could see it. and please dont get started about Federal agents/CIA/Government bullcrap. i am 14 years old. but even though it seems comforting, i never feel like i have privacy! and that nearly drives me insane. idk what it is. i just cant shake the feeling that somthing i following me.