Mary, I'm sure you are fine.
Some girls ovulate late in their cycles, but it is rare.
It is still possible, although unlikely, that you could get pregnant with this type of sexual activity. Try to pay close attention to your body's clues throughout the month. Your body temperature rises slightly right before ovuation, and stays elevated until your hormone levels fall again before your period. Also, the amount and consistancy of discharge changes during ovulation. Also, you will be able to tell when your period is going to occur, or if you may be pregnant.