I purchased something on the game 8 ball. What do I do?

I was playing 8 ball and I went on to the option scratch and win. I started playing but then it told me to wait. A notification came up asking for my password but as my thumb was already on the home button of my iPhone it took my password. Another notification came through saying 'your purchase was successful' i quickly deleted the app and now I'm in panic. I have no idea how much it was. If I did pay anything it came from my mothers account. Does anyone know how much it was?

Of course I don't