The "bad case of heartburn" feeling....it will get better. But, it will always be there. If it wasn't, it would be worse...that would mean you didn't have a conscience.
Have you told your wife? If/when your wife or daughter find out what you did, they have every right to have the feelings they will have. But...people make mistakes. We are human. This is where I would share my faith with you if you believed.
It sounds like you are questioning your addiction. This is where a professional can help you. Whether it is an addiction or not, you didn't stop yourself from doing something you knew you should not do. Either way, you will get help from a professional on how to deal with this.
I compare my affair to a drug. I don't believe I had a sexual addiction, but I was addicted to the high of the affair. I knew it was wrong, but I could not stop at the time. The pull was always there to call, to check the computer, to go by his house, etc. When I ended the affair, I went through a "withdrawal" for sure. My faith, pure will, and my h's knowledge of the affair and full transparancy I offered to him, helped me get through it. The aftermath is the hardest part. The rebuilding is hard. The memories.
Tell me what is going on right now with your situation. Are you divorced? Does she know?