Did I miscarriage? Implantation bleeding? Or old tissue?

I have been having unprotected sex for over 3 weeks with my partner and I am not suppose to start my period for 6 days. I was spotting this morning and now and thought I started my period.. no big deal. Then I go bathe and I go to clean ‘down there’ and I see these things in my water.

It isn’t like toilet paper from whiping. It is like light tissue or skin or something.... I also have had period symptoms but bloated and lots of pressure in my pelvic area.....

what could this mean?