I have just been through 4 days of being so tight that liquids won't go down, but i think this was due to stress. I have been this afternoon to see my Doc and he has taken everything out of my band and told me to rest it for 3 weeks.
Yours is a little different because you are ill, but it may stop you getting better, if your band is as tight as mine, (and the standing at the sink thing sounds familia) you need something done, You must be able to drink, cos if it tightens any more you choke on your own spit, can't sleep cos you can't lie down etc. horrible.
Mine has come out the blue, i have had my band on for 2 1/2 years, last fill was 2 years ago and for it to suddenly do this to me felt very strange, but the relief when it went back to normal was huge.