Nebula discovery

In imaging some distant galaxies, I discovered a very faint structure on the far edge of the frame. I spent the next three nights centered on it, and with a fast scope (C14/Hyperstar)
I got 18 hours of good frames.

I also imaged with another scope in Oiii, thinking it was Oiii and got nothing.

I am now thinking it’s a dark nebula of dust, and doesn’t have any nearby or internal stars to illuminate it.

I’ve looked and looked, and it’s not catalogued or listed anywhere.

I don’t know how/where to report it so it can be confirmed/catalogued.

The Astronomical League seems only interested in Supernovae, Asteroids, and Comets.

The Astronomical Union, will not respond.

Thank you!!