Nauseous πŸ™ƒπŸ™ƒπŸ€’πŸ€’

So this has never happened... my period was like 4 days and it's usually 5/6 days.. it ended yesterday and today I'm nauseous as fuck. I don't think I'm pregnant(sadly) but idk what the hell is going on. Have y'all ever been sick the day after your period?