I have a tight throat and slight difficulty swallowing although not as nearly as bad as yours. What I did notice is that when I get better, this gets way better too. With my digestion improving, my stomach acid is normalized and this improves as well (yes I connect it to the acid as well, but I do not have any diagnosis for it). I could always swallow food, but certain foods would travel very slowly down and I could feel them stuck half way. Similarly, I would have a pill or capsule stuck there, sometimes for hours. If this pill is vitamin C it hurts as well as it melts so I realized that this is some kind of inflammation and vitamin C is making it worse by melting on top of it.
I do not have any idea how can you get out of your closed circle (it does seem like you are stuck going in circles), it seems you have it really bad.
I did want to suggest for you to try adding some nutrient dense foods. Look up what those are and test them to see if you could eat them. I know that some algae are nutrient dense foods and contain basically everything you would need to survive including protein, vitamins, minerals. If you are successful in adding few of food items such as these, you will be sure to get the nutrition you need to survive while you take care of your other problems. Do not worry so much about weight, but more of getting vitamins and minerals you need. As someone already mentioned, vegetable juicing or smoothies (vegetables that you can tolerate) would be one way of getting nutrients in to maintain little of the health you have left and perhaps improve some.
My other advice in terms of foods, try making the following cereal out of oat bran: in the evening, mix oat bran with some plain yoghurt and some lukewarm water and leave overnight (you do same parts of oat bran and water, 1/4 of the measure of yoghurt – this is the original recipe, I kind of eyeball it). In the morning, add some sea salt and water (same measure as before or little more if you like it softer and creamier) and cook it until it is the way you like it in terms of thickness, I like it little softer and creamy so I add little more water and cook probably less. Add an egg yolk when done (if you are worried about eating raw egg, then add it little before you are done cooking this). You can add some butter or ghee in there if you can tolerate it. This should give you some good nutrition there and the bran is prepared properly so it will not get in the way of absorbing nutrients from the rest of the food.
I would also like to suggest trying bone broth as this will offer lots of vitamins, minerals, healthy fat and some other nutrients which will repair your intestinal wall and improve digestion as well as acid production issues. Here is a good recipe for the bone broth: http://www.wonderfulingredients.com/soups-on-sunday I use different variations of this recipe (depends on vegetables I have and spices). I use rosemary, whole black pepper and bay leaf as spices. When done I strain it and measure in jars and put in the fridge. When I am ready to consume it, I just pop the jar into the microwave, add some sea salt and parsley (you can omit the parsley as if it gives you trouble swallowing it) and drink it warm. I usually drink at least 500ml per day of this broth and it restored my body after 5 months of constant diarrhea and loosing 30 pounds in just few months.
Can you (or Nick as you are not feeling well) post a list of foods you know you can eat and foods you know you cannot eat? Perhaps we can it work starting with what we know you can eat, then test a new food item every three days and look for new things you can add to your diet which will not feed candida.
I hope at least some of my advices help you.
Best of luck to you!