Cause For The Dry Mouth After Quitting Smoking?

hi doc quck question i quit smoking canibus and cigs due to dry mouth and tight throat try a couple day later again then came back hard swallow ive quit before over years google crazzy scared of the worst every time docs give me the ok ecept lpr and anxiety plus withdrals of sub insomnia dry mouth throat was so bad last night in tears cant swallow today i used gavison anti acid an tightness free uped not 100 percent but better so i think im on the right train with throat so no u no my background heres my question i noticed thin small raisied line vertical on my palatoghary arch when i say a it has grown its skin color little white but has me worried im 38 smoked 4 12 yrs but the has tons of things in it my ent said yrs ago red bleed painful or key worrys other then that im a hypacondriac so that my question no pain in that area except throat but i thinks that from lpr flair up cause c dont come and go any advice thank you