Is this bleeding normal?

I have had to change my BC twice to see what worked for me. I recently just switched brands and I am on the combo alysse 21. I am on the last week of active pills, I have 5 more pills to go. But the last two days I have been cramping and been spotting and this morning the spotting went from dark/reddish brown to pink. Is this my "period" or just breakthrough spotting. If it is my period is it normal and should finish the pill pack?