Are hiv symptoms possible just four days after possible exposure . and just last for just 1 day? symptoms were vomiting , fever , diarrhoea. thankyou

Not possible: Acute HIV symptoms cannot start sooner than 7-10 days after exposure and never would clear up in under 1-2 weeks. Sounds like you had a garden variety viral gastroenteritis like norovirus. If your partner 4 days earlier had it or was a carrier, you could have caught it from him or her. But for sure this isn't HIV or any other standard STD.