My period was 3 days late and then the spotting started. it's red/pink not brown. it's been going on now for 5 days. what should my next step be?

If there is any: chance you could be pregnant, I would check a home pregnancy test now. They are very accurate once you have missed your period. I predict it will be negative. So if negative, just watch and wait. You will either get more bleeding resembling a normal period, or this will stop and you'll get a normal period next month. If irregularities persist, see your doctor:)