Hello mariah,
Blood clots oftentimes, comes with one's period. I don't think you miscarried. A heavy period, long period of standing, lifting, changes in one's hormones, there are a vast number of reasons that blood clots form. I wouldn't be overly concerned at this point, however, if you should see larger clots with unbearable pain or if this consists over another day or two please see your doctor.
Good Luck,
Faded Rose