Weird Period.

So, I've always had the same period. Every single month since my BC was put. Me and SO do not use protection (only keeping in mind from things I have read on google). My period last month was longer than usual, and started out super light for like 4 days, and then I had my normal, painful, heavy, bloated, period. Well this month, I am on day 7 and it's still the brown (old blood) kind of. And for 2 days there was a smidgen of reddish/ pink blood. This is not normal. There is still cramping randomly, not nearly as bad, not really any bloating at all. I just don't really know what to think. If I should test for pregnancy? Idk. I'm at a loss.