So worried!!

I passed something in the shower, earlier. It looked like a clot, but I’m not on my period and it did not come with a lot of blood. It’s about the size of my thumb, is not jelly like (the way clots

usually are). It’s more rubbery and smooth. It has darker colors in it, and a couple white grainy bits in it. Miscarriage (I did not know I was pregnant, if I was)??? Tumor??? Cyst??? Anyone seen anything like this before?