I recently came off my menstrual cycle a week ago... I remained off for week now I'm bleeding again! There are pains but it uncontrollable bleeding and large clumps of it! Could it be something serious or is it normal to have 2 periods in 2 weeks?

See your gyno could be endometriosis or inflamed uterus, there's a number of things it could be. Nothing to play around with, too much blood loss could be fatal.