Irregular periods pregnancy confirmation

Hi.My gf is suffering from Pcod.she was under medication for past 3 months(overal l).she stopped taking for 4th month.when she was under medication she used to get it every month on 1st.But for the 4 th month( she didn't took tab) she didn't got her periods in time. Just before the day she should get her periods we are intimate for the first time.But im sure that I didn't ejaculated.My penis touched her vagina twice for few seconds.She had menstrual symptoms for 2 days.She also had increase in white discharge for 3 days. After 6 days she took 1 mensovit plus tablet.Later she started with Devrin for 5 days twice a day and now it's second day. Does she  gets her periods back??? There any chances of getting pregnancy as I touched her vagina twice(precum).Or her periods are delayed because she was not under medication(overal l) last month as I heard it will delays the menses.pls help us...tq