I think. I have had a miscarriage I lost a sudden gush of dark blood and have had contraction feelings all. Day but no more blood and feeling sick?

Possibly. The symptoms you are reporting can be from a threatened miscarriage or from a complete miscarriage. I threatened miscarriage means some bleeding with or without cramping, but the baby is still alive. A complete miscarriage means you passed everything. The only way to know for sure would be with blood work and an ultrasound with your doctor.