helloo

it has been a week since my girlfriend had her period, and it has been 6 days since the last time i had sex with her, we had sex without a condom and half way i did put on a condom, so today is the sixth day, and it has been 2 days that she feels very gassy and her breast are biger slitly then before, she says she put on some weight on her hips as well, i was wondering does that mean she is nocked up or not, is it posible to feel the sidefects of being pregnant after 4 or 5 days of sex, her next period is in like 25 days or so, this is killing both of us, any advice, can we do some thing to stop it or is it too damn late, and can we detect it. thanks