Suggest Remedy For Difficulty In Breathing And Lack Of Clarity In Voice

hello doctor i am having some problem in my ches and throat when i wakeup after sleeping my throat is conjested i am 18 but i smoke atleast 10 to 12 cigarette daily in the time between 10 hours so am i having lung problems or what ? i work in a call centre when i talk with customers sometime while talking i feel that i am having problem in breathing and my voice is cutting in and out so do help me . now if i smoke i feels like vommiting .