gosh that sounds serious my first guess would be your body still trying to heal from the misscariage. Basically the point of your period is to ovulate and clean out your uderous. Is this normally about the time you would start your piriod if you were not pregnant?
anywho i agree you need to call you doctor immediently with any complications or concerns
You need to call your doctor anytime spotting or leaking anything... I know that I would rather know what is going on than not knowing....
I hope everything is O.K.