Flipped the Right way

So essentially I was trying to put the condom on and i had it the wrong way around as i was trying to roll it down and it wouldn’t. It touched the head and i don’t necessarily remember if there was precum but im still slightly worried. She was on day 3 of her cycle as this was a few days ago but still worried about chances of pregnancy. Does anyone know the chances of pregnancy at all? She’s not on any birth control.