For the past ten years, I've had this same thing (clicking sensation when I swallow) mostly while laying down, and only on my left side of throat. Its always been there day and night, but over the past 2 weeks its become significantly more bothersome, and feels like a sore throat, but like its from something rubbing or pulling on my tissue. Its been going on since right after a tonsillectomy-gone-wrong.
About 9 days after my tonsillectomy (~ten years ago) I had that rare complication of post-op bleed, and the night before I was about to return to work, my surgical site started minor bleeding and clotting on the left side. I drove myself to the ER, and as I drove the clot got larger and larger to the point where I had to keep my mouth open. When I arrive they cauterized it, and kept me overnight for observation. At about 4 am it burst open and started bleeding profusely. I filled one of those large pink hospital tubs with gushing blood, emptied it in the sink, and filled it half again with blood -- all while waiting for the nurse to answer my call button. When she arrived, she looked mortified, and she hit some alarm and a bunch of people rushed in. They sent me into emergency surgery to repair and restitch the open wound.
I was in the hospital for a week, and after I was all healed up they told me I almost bled out. The doctor on call also jokingly said they "hog tied" my wound closed with heavy duty stitches that would stay put forever, and there was no way it would ever bleed again.
It sounded reassuring at the time, and fast forward to now, I think it may be what is creating my strange sensation and pain now.
Since the tonsillectomy, I've since always had this weird clicking feeling when I swallow, and a pulling sensation, always to the left side of center -- same place where the tonsillectomy problem and subsequent repair happened.
I also choke very easily while eating and drinking now, which I never did before. This makes it hard to eat in public since I will usually go into a coughing fit. Anything gritty like almonds cause me to cough, so I have to be very careful what I eat. This never occurred before my surgery.
I suspect that there was some traumatic injury during the surgical repair, perhaps from pulling my tongue out, or perhaps from industrial strength stitching up.
The experience of bleeding out and emergency surgery was so emotionally traumatic, that I never followed up with the post op after the first visit. So even though I've had complications, I was so scared of the possibility that I might need a further surgery, so I never went back. Now its been ten years and I'm starting to think about it more from the safety of time and distance.
Recently I've started asked various doctors about the issue with my swallowing, when I'm in for something else, and their answers have ranged from "its just scar tissue" to "probably normal."
In the past 2 weeks there's been a change in that I've had a minor/moderate pain continuously, all day and night. At first I thought I was was getting sick, but after a few days, I realized the pain was different. It was more mechanical like something irritating my throat, not like the start of a cold or flu.
The clicking has much more prominent when I swallow; lately it actually feels like a sharp pinching pain, as if someone snaps a fat rubber band on the left inside of my throat right as I swallow. Or like there is something rubbing against something else in my throat, and the swallowing creates a stuck feeling until it releases and then pops. Very odd.
I have spent some time today researching various things on the internet, and found a few things I'm going to ask my doctor.
Any other thoughts or epiphanies would be welcomed, if anyone has ideas. I'm in no rush, so even if you read this down the road, please still reply.