I'm thinking my period was spotting and not a full period.

Look, it's super common in the first few years of menstruation for the body to still be figuring out the rhythm, you know? So it can happen that you have some bleeding that isn't exactly a real period, and we call that spotting. Often it's just a tiny bit or a small amount of blood, but it can be a bit more, and it usually lasts less time than a normal period. Don't stress too much if this happens.