pregnancy

My girlfriend has an irrgegular period. One day, around 5 days after she had come off her period we did some fooling around and my penis touched her vagina but i didn't penetrate neither did i ejaculate inside of her. However, she has been having a lot of discharge recently and still hasn't come on her period since the time of the incident. Is there any chance of her being pregant? Please help as we are both worried