Coughed up blood while having a sore throat and fever, is this serious?

I’m shocked since this has never in my life happend before no matter how hard I coughed or anything.

And I’m so young aswell 18M 155LBS 5”7 Used to smoke weed and vape nicotine, even when I used to get sick while on weed or nicotine I would never notice blood.

Have quit 2 months ago

I caught a really bad cough/fever and noticed some flecks of blood when I cough fat pleghm,

It was last night at first then today morning aswell.

Here is a picture of how my throat looks and the blood.

Someone try to help me and let me know.

I was told to not worry but it’s hard not to since I’m so young.