Had a miscarriageon 19nov2012 nd had heavy bleeding till 4dec nd on 13dec again it start till 27dec nd after that I have no periods nd it's 12jan now?

It's gonna be. Irregular for a little while, take some iron supplements but the uterus is healing inside where the pregnancy was. Sometimes there is an incomplete extrusion of the tissue and it takes a while, may need to get an ultrasound if it continues but will likely regulate itself soon.