Hello,I Am 17 Years Old And I Am On The

Hello,I am 17 years old and I am on the rigevidon combined pill. I started the pill on the 27th September and a few days before my first break I missed a pill but took it in the morning. A few days after that I had unprotected sex a few times. About a week after then I started to get a stomach ache and feeling a bit sick and my breasts have been hurting ever since. I also missed a pill a few days ago and now have brown discharge. Am I pregnant?