Misscarrying???

Im 10 weeks or 11, my doc already told me im at a high risk for a misscarry, this is the 3rd or 4th time these little tiny brown balls come out when I use the restroom

There's multiple of them and there tiny.. idk what to do. Did this happen to you and you misscarried later? She said i can possibly be having one but its going slow... and also the other day a white ball came out but no blood in it or anything, she said that,couldn't be the baby.

But im so worried...