Hi guys
Sorry for my delayed reply, been very busy lately.
MJDee:
You are correct in your assumption in that while eating, I will reach a very obvious limit when swallowing assisted by heavily carbonated water (or other carbonated drink) is required. If I don't get my water straight away, a number of things happen. Firstly and most obviously, the food may come back out. This doesn't really ever happen as my oesophagus is completely paralysed and can't force food back out. Alternatively my body will react with short bursts of extremely violent and very LOUD hiccups which seem to move just enough food through to relieve the pressure and gives me more time to get my water. A bit convenient but I couldn't do it in public, it'd scare the hell out of people. Thirdly, and most worse, sometimes a little will move down somehow and I think creates a vacuum which I feel just above and in my stomach. It's extremely uncomfortable and feels like a very bad stomach. It makes me feel sick when I use my water. Usually though, everything is fine.
And yes, I have felt light-headed after swallowing, similar to standing up too quickly, especially if it takes a bit of effort to swallow. Not enough that I thought I might pass out though. The worst thing about it is the strange way it makes me feel mentally and emotionally while I carry out the whole procedure of swallowing. Sometimes before I use the water to swallow, I get a sense of panic that maybe this occasion it won't work. It always works, but sometimes I can't see quite how it will. While I am swallowing, I have to be completely alone, out of sight of anyone else, preferably shut in a room knowing that there is no risk of being disturbed by anyone else. If I'm out and about I have to be outside and as far away from people as possible. The few times I eat out, it has to be somewhere with a car park and I find the most solitary corner of that car park to hide my car with plentiful supplies of water waiting inside.
Afterwards, the effect is such that you would think I had a cold. It's not nice to describe, but for about ten minutes following a meal I'll have a lot of rubbish come up onto my chest and to the back of my throat. Sometimes my sinuses get blocked. Cue lots of phlegmy coughing and sniffing. It clears after ten minutes though, but for that ten minutes I can't really hold a conversation very well - that's OK because I'm naturally anti-social anyway.
In my case of course, if the water is too cold, I get brain freeze. If the water is too warm, it looses too much gas and isn't as effective. In Summer I keep them in an electric cool box on lowest setting. The fridge is too cold.
As sandraw says, the obligatory (long and again very LOUD) burp tells me the food has fully gone down. That burp is one of the most enjoyable feelings there is. My record is 18 seconds. I have mastered the art of the silent burp too, for those occasions when it would be inappropriate.
I've never had the bad taste. I've also never had the remains of the water I've used. I make sure not to drink anymore than is needed to swallow my food. When I burp I know there's nothing left to go down, neither food nor water.