thank you for using health care magic,
well, chances are there for pregnancy
in your case because you had sex twice after taking first dose of pill..vomiting
and loose motion
can be because of side effect of pills..
take home pregnancy test..but do not trust it blindly because in early stage it can give false negative result..so go for more confirmatory test like beta hcg level or ultrasound
in future practice safe sex.. you can use condom or contraceptive