How To Avoid Pregnancy After Having Unprotected Sex?

I had an intercourse with my girl 5 days ago. Really you find it studpid, as i don't know even whether now she is still virgin or not.
I unfotunately not used precautions
& i should give her unwanted-72 but that 72 hours also gone

so i want to ask whether i should go for MTP kit, or do something else.
1 more thing , still it just 5 days ago, so she didn't had her pregnancy test