What Could Heavy Bleeding With Clots Post A Miscarriage Suggest?

dear doc am 23 yrs. i got married at the age of 22 after 6 months i concivied naturally but unfortunatlly i had misscarraige at 3rd month........ and am having painfull clot periods by missing my dates and it was allmost 6 months passed after my misscarraige i am worriying about my health why am not conciving yet ...........can plz rply to this mail plz doc......................