Need some advice

So I was feeling pretty normal all day long untill i came back from a walk, I started feeling very hot but its only my face & my ears, i feel like my face is setting on fire and i dont know if this is hot flushes or possibly something else, im 18+5 and ive had these hot flushes for about 2 hours now, im unsure what to do & of this is normal, I have checked my temperature and it was 37.4