idk what is was and i need answers

so... im on my period which was late by almost a week... and my bf and i were having sex but we stopped (he never finished... he was too grossed out from a smell he said...) and i went to shower... there was a hard thing poking out of my vag area and i inspected a bit when it fell out and it was like this really wierd hard off-white ball with a stick (literally the only description a can give) then a big pile of blood rushing out (not like too much but enough to alarm me and call my boyfriend over) he came rushing through the bathroom door and when i showed him, he couldnt figure it out... i wrapped it in some toilet paper and flushed it (which i now regret cause i wanna know what it was!! shouldve take a picture) but we r still confused and i cant prove it to my doctor and i cant find anything online. does anyone have any ideas what it couldve been?