Am I pregnant

Toshia

So my period has been off and on for six days now it’s mostly been just spotting one day it was light bleeding my period has only ever lasted 4 days and it’s usually really heavy with a lot of cramping I took a test two days before my period was suppose to start but it was negative my period sorta started the day it was suppose to but was never heavy this has never happened before and I’m not sure what’s wrong