Feeling of something stucked in throat.

I have been suffering from IBS whole my life. Ibs was diagnosed in 2011 after a colonoscopy. Last year endoscopy was also done to rule out celiac. It was just ibs. I am a smoker and usually smoke 10 cigs a day. I have also been suffering from mild anxiety since my father passed away 6 years ago. For last couple of weeks i have been feeling this strange sensation that something is touching my throat at larynx area. And excessive mucus is down there in throat. I am taking rabeprazole domperidone caps for 8 days now but of no use. I suffer from GERD occasionally bit it goes away in a day or two. Rarely get heartburn though it might be silent reflux. Do i have to worry about esophageal cancer or any other throat cancer ? I am male 31 year old