How To Terminate Pregnancy?

hello sir, my gf did not got her periods. she s 2 days late in her cycle. We did not had intercourse. but we were just playing that day(15th Dec). I touched my pennies and later I touched her organ. Its about 12 days over from such acts. her period was due on 25th dec. but she didn t get that yet. now how to ensure and stop pregnancy. She s prompt in her cycle