Not sure what to title this

So we had our first baby in May(many thanks to this app!) And I haven't really had a period since then, I've had spotting for a couple days 3 different times. Should I take that as my period? I'm not sure when I'm fertile any more but we want our babies to be close in age so I'm planning on trying again soon.. the doctors said that it could be my period is different know or my body just getting used to itself Idk. Anyone have any info?