Hi Doc, My Gf And I Had Sex On January

Hi doc,

My gf and i had sex on january and she bleed 4 days earlier (3 february) on february after taking postinor 2. We had sex on 8th of feb and she still on her period and i use condom. Now 7 march and still no sign of period and also pregnancy symptom , but one thing different is her vaginal is ichy on the inside like on the lips, and she saw spotting, can u please help me doc