me.and my gf had oral sex and on 15th and 17th dec. when can we hav home pregnancy test and blood test to get accurate results?? she missed her periods date by 5 days
She can not get pregnant with oral sex.
To use a home pregnancy test you need to wait at least two weeks after having sex OR when her period is due.
Since you had sex 5 days ago, and she expected her period 5 days ago, she would have been at her LOWEST fertility. Even if you had sex she'd be extremely unlikely to become pregnant.
She can just be late. It happens.