CONCERNED

Dej

My cycle came on today when it is not supposed to come on 10th no later before or early than that. But today it came on I had very bad cramps when I never get cramps on my first day, nor does my bleeding be as heavy as it was today. The color of it was brownish red and I’ve never had that problem before as well. I am on birth control now I have the pills could that be why? I’m not sure what to do is this normal ?