Pill and Period and second period?

Shania • Smile Everyday :)
I've been on the pill for 8 months now and I'm still a bit confused with dicifering whether I have my period or it's just spotting.
I had my period last week and it lasted 7 day (normal for me) when I'm on my placebo pills, but then the week after on Friday till now I've been having almost like a second period (3 days now) except it's light and a small emount enough to fit on a long panty liner. Is that spotting or an actual second period.