m 23 and ive been smoking for 3 years now since i was 20 and

it feels like something is in my lower throat and its a little ichy
ive been hacking up alot of mucus
and ive stopped smoking since 4 days ago once i felt like there was something in there
and checked for a lump AND NO lump in my throat
i dont know if its alot of mucus or some food particle or something its starting to scare me cause im having anxiety attacks again
my throat doesnt hurt it just feels like something in the inside of my lower neck and its bothering me
is it throat cancer? or what

i did hack up something yesturday that was little and yellowish my throat did fell better but now i got that feeling again

i dunno i think im just over acting, but my throat been hurtin me, maybe cus i been in the south for a week in dry wheather but, my throat was hurting so i looked in the mirror, and i noticed my tonsil has a tiny white spec, i looked up oral cancer and it didnt look like it, and tonsil stones but same thing, i was wondering if anyone knew if i should get it checked or is it natural