its not very pleasent is it?! mine started about a week and half ago, its all day and night, not really found anything yet that helps! sounds awfull but few days ago dijon mustard on toast was only thing that i could eat!!
try and just eat even a dry biscuit every couple of hours, not eating anything def makes it worse* and keep hydrated, plenty of water*
but however bad it gets i force myself to smile and think it must be a good thing!
good luck!*