‼️‼️Spotting 4 days before my period is due please help

Friday Started spotting light pink 4 days before my period is due, it's now Sunday and the spotting has turned brown. it's not a lot of spotting. Very little amount. My period is 3 days away. I'm scared has this ever happened before to anyone else before their period

?? I really don't want to be pregnant. Please help.