ball that feels like testicle in scrotum

hi , i’ve had this little ball that looks and feels almost exactly like a testicle , it is connected to a cord of some sort and i’ve probably had it for a couple years now but chose to ignore it thinking it’s going to go away but it has not changed size or shape in anyway. if i push on it , it gives off the same feeling as if i pushed on my testicle. it literally feels like a third testicle in a way. i’m going to a doctor today but i just hope someone can reply fast just in case i won’t be able to go. i’m 18