My Period Only Last Several Days Usually And Then Typically

My period only last several days usually and then typically I'll get 2-3 days of spotting after. This time I basically spotted my entered period which is weird because I normally bleed heavily. Soon after literally a day after I began spotting again.. At first I thought it were just fluids but then one day was a bit heavier and actual blood was coming out. This happened about an extra 4 days. Did my periods cycle end and change its cycle to start now or could it be something else.