Is Unwanted 72 Pill Advisable For Unprotected Non Penetrative Sex?

Today we had dry humping..i was on my underwear but she was not wearing anything..i was lying down and she was on top of me and i inserted my penis but it was inside my underwear....my penis went little inside...bt i did nt cum...i jus had precum but she had her orgasm...now i am tensed that if she gets pregnent...is there any need of taking unwanted 72...after 10days she will hav her period...what to do please guide us....