Early miscarriage?


I had early symptoms like major breast tenderness, darker nipples and major fatigue. I didn’t take a test because negatives are too disappointing. I thought I started my period but the blood is so dark and heavy that I went through a maxi pad in an hour. I’m also having major cramping I saw this clot in the toilet and it wouldn’t break apart. I couldn’t get a good picture because my camera wouldn’t focus. What do you guys think this could be?