If you never had a delayed period before and if you are not on any contraception
and sexually active, it is likely that you could be pregnant. You can take a HPT with a fresh early morning sample. The spotting you have could be an implantation
bleed. To be more confirmatory, you can get a pelvic/trans-vaginal sonogram. Implantation bleed is a fresh bleeding and lasts from a day to a few days and may sometimes mimic a normal period. Please see your specialist for an evaluation and management. Wish you good health.