What's the difference

Eve
I'm going through a miscarriage right now. On Friday I had bad pain and I thought I had passed a blood clot. Not too big maybe an 1in. But what's the difference between a blood clot and tissue? I haven't passed anymore. Just blood in my urine and I have not soaked a pad. I go in for blood work again to make sure levels have dropped. Just want this over all ready.