miscarriage ?

Kimberly

so I started having unprotected sex in January, and I had missed a couple of periods. I had taken a pregnancy test but it came out negative. In March I got into a fight and I got chocked and thrown on the ground, a couple days later I started bleeding, the blood was all black and had clots in it, it was very heavy and I had really bad stomach pains. Could it have been a miscarriage?