What happen if you had sex without a condom but the male didn't cum in the girl vagina but she still missed her period ?

Get pregnant + STDs: Any time you have sex w/o using condom, you risk both pregnancy & stds, even if guy doesn't ejaculate inside girl. That's because sperm are present in lubrication fluid even before ejaculation. Bottom line: wear a condom each & every time. It's not worth the risk. And do so even if she's taking a birth control pill or shot since those don't prevent stds.

Pregnancy test: You should obtain a pregnancy test either at an OB office, planned parenthood, or the drugstore. It is possible to get pregnant without the man ejaculating. There is a pre-ejaculate secretion that contains sperm and can cause fertilization. It would be best to verify whether you are pregnant or not and seek the appropriate treatment.