Don't think so, pal. Every comet I've ever heard of, orbits the sun.
Some of them are also coplanar with the sun.
Which means WHAT, exactly? That all comets which orbit our sun, originated from Earth?
Answer the question and stop being so weirdly cryptic.
I'm asking you a straight question. If you know what you say you know, then explain your position. If your final defense is to tell me to study the works of Johann Kepler, then you've conceded the argument. That's a coward's cop out.
The comets do not orbit the sun, they are in orbit about the Earth, and their positions are describable relative to the Earth. The Earth lies in the plane of their orbit.