Am i sick or hungover

I(f16) drank for the first time yesterday but it wasn’t a super big amount. I just got super chatty and social and a little bit unsteady. I woke up with just a tiny tiny headache and was fine for the whole day after, until maybe 9 or 10 pm and now it’s currently 2:30 am and i’ve taken two pills but my head is still trying to kill me. I think I might be getting a fever but I just wanna be sure if a hangover can take a whole day to appear.