Hello and welcome,
You seem to have had contact twice after the last period and on both times it was unprotected.
Now about unwanted 72 tablets:
These tablest are meant to be used when there is a an unexpected sexual contact that is not regular. Meaning that the contact is occasional like say once in 6 months or so. The tablet must be taken within 72 hours of the sexual episode to be effective. Also it can be taken only once in one month.
A new tablet is needed for every episode.
Now about your case, as you had sex twice this month, the tablet will not protect for the first episode as I assume that it is already more than 72 hours sice then. For the second episode it will protect provided it is taken within 72 hours. So you will still be running the risk of
pregnancy from the first episode even if you take the tablet for the second one.
She may take the tablet if the sex was within 72 hours from now and it will protect against that sexual episode only.
The risk of pregnancy is small from a single act and is higher if the sexual act is between day 10-20 as these days are more fertile for the female [more likely that ovulation occurs on these days] than the other days.
For the future I suggest that you use some better method like condoms, pills, or injections, or implants to prevent pregnancy.
Hope this satisfies your query.
Thanks for using HCM.
Feel free to ask any more questions that you may have.
Dr Madhuri Bagde
Consultant Obstetrician and Gynecologist