Early period on birth control

Patient: Hi I have been on birth control for almost 5 months (I am on my 5th pack). I have one week left of the hormone pills. I had sex for the first time a few days ago, and I started my period today- a week early. My periods are generally irregular, and I have experienced some early bleeding in previous packs but this time is the first time it has been this early. Is this normal? Am I pregnant?

Symptoms: Birth control