I had my last depo shot in June of 2011. Was due for next shot in September. I didn't get that shot. Last month I started feeling movements and it has continued this month. I've had the frequent urination, some nausea, not much. slight bleeding, but didn't last one day and only when wiping. My clothes around the waist area do not fit anymore. I have taken 4 HPT and all say negative. Any suggestions???