welcome to healthcaremagic
as you told that your gf had taken I pill
within 24 hours of unprotected sex. although she get periods after 8 days after taking ipil.
means she had not got pregnant.
now want to tell you that I pill is not safe drug as you use as pipermint. it surely can make changes in hormonal
level and due to changes in hormones, she got the symptoms which you have described.
just you have to wait till it will re-establish as a Norma condition.
one more guidance for you that it is safe if you try condom for getting enjoy, its safe for avoid pregnancy
as a well as it can protect you both from sexual transmitted diseases.
Dr. Nikul Patel