Digital Identity

I found an old instagram post that I uploaded 4 years ago, in the description of the picture it gave me a user thats called savagekilla805, I searched it on instagram and it gave me my far away cousin's profile. The picture came out of a web page called piknu, I opened the link that was on the bottom.on my picture and send me to my cousin's profile picture. Im not tripping but I feel kinda exposed or something like that.