I understand this must be a very stressful and overwhelming situation for you. Please stay calm and consult a proper gynac, they will help you safely and confidentially.
I cannot give any medical advice on this, but I know that trying to do this without a doctor's supervision is highly risky. Please visit a hospital or clinic to stay safe.
At one week, you aren't even technically pregnant yet, but if you mean a missed period, please don't take any random pills. Go to a proper doctor to handle this safely.