Begging Allah Ta'ala for forgiveness

I am an 18 year old student and a practising Muslimah. But I committed a sin few days ago. I got distracted to a sexual website and made a chat. The guys asked me for pictures of the chest and I gave it. After sending it I realised how big sin I committed. I felt very bad and cried for forgiveness. Because I want Allah to trust me again and I can be pure again. I never did anything like this. But now I feel that I'm not a good person. Will Allah Ta'ala forgive me? I promised myself not to go this way ever. I dont want Allah or my parents to be ashamed on the Day of Judgement in front of Shaytan. I had a dream of making them proud. What should I do to get away from the punishment? I am scared of Allah.