Spotting Postpartum?

Sydne
My baby is 4 months old and I started spotting on the 3rd. It was only a little and quit the same day. Today I had cramps and a little more spotting. Fertility wise I have no idea!! Should it count as a period? I don't really want to get pregnant since it would be my 4th. I didn't start my period until 9months postpartum with my 2nd and immediately got pregnant. Anyone else have any advise?