is this normal?

Ci
I am on the pill and have been for years, but my period this month around is a little odd. I've been cramping like a bitch for about 3-4 days with only light spotting of brown blood. I now have 3 more placebo pills to take, and I have yet to see bright red blood like normal, it's still brown spotting, sometimes a little more than spotting but that's it. Is this normal, ladies?