What is that? OB didn't even know

Had my six week ultra sound to confirm heartbeat and an extra imagine showed up.. Has anyone ever seen this? OB said it could be the possible ultra sound machine not being the best or possibly another fetal pole.
Anyone? Suggestions? She said I could make another appointment downstairs in my hospital where the better machines are at to not have me worry about it.... She didn't seem concerned though and was able to hear the one heart beat ❤️125!