My first time at all this..

none

Spotting..can it be...

So my last period started on the 17th or 18th and lasted longer than 7 days which is very abnormal for me cause usually they only last about 5-6 days.. I was cramping yesterday.. But today I woke up this morning and didnt realize it til I had ruined a pair of undies from light blood , couldnt tell exactly the color cause dark undies but it was definitely light blood ..idk whats wrong with me..please help...