Unplanned Pregnancy. Be too bad for her?

My girlfriend and I were having some lovely time together and we ended up having sex. I easily get precum and yes we did oral too. She touched my penis and I am pretty much sure there was precum on her fingers and mine too a little. She applied saliva ( again there was a bit precum she said ) herself to her vagina and we realised that within 2 - 3 mins that there was precum. She washed herself with water immediately. We are scared of an unplanned pregnancy since it's her DAY 3 OF FERTILE WINDOW and OVULATION is day after tomorrow. What are the chances of getting pregnant? I didn't cum inside the condom even. There's only precum. She also had PCOS. I need genuine help from a gynecologist. Is taking a contraceptive pill gonna be too bad for her ?