I wouldn't worry about the mighty too much as long as you are sure it is the genuine article. Have you tried vaping at a lower temp? The mighty has a good bit of horsepower. Some vapes probably do have poor materials but a genuine mighty is likely pretty damn safe. Do you think you might be coming down with a cold? Have you tried much different tasting strains with way different balances of the terpenes? Also, smaller loads. Find a way to reduce the size of the load.
You may well be right, maybe irritation due to how powerful it is. I believe more terpenes are in vapor too per gram of material. That might make it seem hotter? I have gotten some pretty giant pulls before which felt like I got kicked in the chest by a mule because it felt so expansive. Also cannabis is an expectorant. That doesn't necessarily mean you are getting poisoned. I'm sure the cooling chamber can take probably double what runs through it as far as temperature, maybe even more.
I still think it would be a good idea to see a doctor and get checked out, at least if you take my advice and give it a while, or just go. Even if it is something silly at least you will not be worried about it any longer. I have gotten a click inhaling or exhaling or both when I used to smoke cigarettes. I can't remember what it was but it had something to do with irritation due to coughing and still smoking. maybe it was just mucus in an inflamed throat making the clicking. Oh, u know what, cottonmouth made it worse now that I think about it. It wasn't anything to worry about for me, but yours may be different. I would do those 3 things though, lower temp, less material, different strain, and someone mentioned using water, that might help to.
I doubt it is something to do with the cooling chamber or whatever it is you are worried about. You can go all glass in the vapor path of many vapes. Put your mighty up in the trade area and I am sure someone will snap it up!
Too rich for my tastes. I prefer glass too.
Edit: just looked at your posts and you should see a primary doc to get checked out and explain what you are experiencing (everything, your throat, anxieties and other stuff). They may be able to refer you to someone who can help you. Maybe cannabis is not for you.