I know this question may sound disgusting, but I have had brown spotting for the past month or so seemingly nonstop. I'm supposedly on my period now. I have had bad cramps, but that isn't unusual for me. My bleeding has gone back and forth between heavy and light since Friday. Today I removed my tampon and and it was didn't really have anything on it...but about ten seconds later a sac fell out of me. It had no blood around it, it was just a red sac that looks like it might have veins in it. I poked it with a needle and it still kept it's shape and it required pressure in order for it to go through, I would assume a blood clot would be very soft...but this was fleshy....kind of reminded me of a piece of liver judging by its consistency. The shape initially reminded me of a leach, with it being slightly bigger than an almond in size. I am really freaked out! My doctor told me last year that I might have endometriosis, cysts, or fibroids. Could this be caused by any of those? or possibly a miscarriage?