I had sex with my girl friend. Her last period was on feb 20th 2018 and we had unprotective sex on march 9th. I didn’t ejaculate but released white on her vagina.  She had taken ipill the very next day! And her periods are usually irregular. 

And today i.e 24th of march 2018 she had a blood flow which is less not like  period blood flow like how it is used to happen. What happened  to her ? Is she having any problem because of Ipil? Can we consider this is a period ?