What Causes Feeling Of Throat Thickening?

Hello, I'm 29 years old I have been smoking since i was about 14 I do want to quit but have been finding it difficult due to anxiety and depression. The main problem is my throat it constantly feels thickened but thats only when i haven't smoked much in the day. It feels thickened and really hurts at times but the thickening feel never goes. I do sometimes get sharp pain in various places in my chest and back. but I think that may be due to tense muscles or trapped nerves. I'm worried to go to the doctor because of bad experiences with different doctors, who have gotten angry with me instead of helping me and puting my mind at ease. could you advise as best you can please! thankyou