Day 2 of period light spotting

Suppose to be fully on the curse by now.... But no cramps... Went all night and nothing... Not sure what to think... But I never been 2 days late... With my very 1st pregnancy I bleed until I had the baby at 6 months pregnant.... I still don't think it is pregnancy... Stress but I'm not stressed right now... Boobs are swollen a little sore but I just feel normal no signs of a period... When should I get concerned??? Told my husband in 4 days if nothing happens I will take a test....