Most likely she's very, very stressed about the idea of having had unprotected sex and all the possible consequences. This is far too early to be having morning sickness, if that's what you're thinking - if she's conceived, her own body doesn't even know about it yet.
That freshly fertilised egg needs time to travel down the fallopian and implant in her uterus. If that idea is scary enough to make her vomit, then she really needs to be seeing her doctor just right now for emergency contraception.
Parenthood is for grown-ups. What does it mean when a girl vomits on the same day of unprotected sex? Quora User , Mother of five. Related Questions After how many days vomiting start in pregnancy? I had unprotected sex with my boyfriend for a couple minutes, but he did not ejaculate any at all, could I still get pregnant? I had unprotected sex five days after ovulation and three days later l started bleeding can it be my periods or implantation bleeding? If a girl gets her period after 2 days of unprotected sex what does this mean?
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