No twin right??

Mary

I keep having this nagging feeling it might be twins but maybe that's mainly because twins would be terrifying lol. Twins can't be missed on a 6 week scan right?? This image quality seems pretty good too so I'd imagine not possible. I do have a subchorianic bleed the US tech was "large" but what's the area of black to the right of the obvious baby? 6w5d here