Breastfeeding/period/pregnant questions...

Hello! I had my 4th baby almost 5months ago, breastfeeding and havent had a period yet. Last week I spotted for about 4 days. Not even enough to wear a pad, just when I wiped. Would that be considered my period? Had unprotected sex a day or 2 after it stopped. And cramping in the few days after...Hoping we are not expecting baby #5! Lol