TMI but really need help! Is this miscarriage tissue?

Jacqueline.

I passed this and suspect it’s placenta. I have been reading up about blighted ovum and guess this is what’s happened with me. I have been waiting for period to start for almost 2.5 months so I can begin <a href="https://glowing.com/glow-fertility-program">fertility treatment</a>. I did pregnancy test and it was negative but I still passed this? Please help! Has anyone had something similar come out?