Unbearable throat after endoscopy

Don't worry about this. It's perfectly normal after upper endoscopy and will go on for a few days. Unfortunately, the doctors never warn their patients about this in advance. (I'm a former nurse btw.)

You won't have done yourself any harm with the acidic juice, but it's best to stay off it for a couple of days. You should be able to manage milk and creamy yoghourt. Scrambled eggs usually go down well too, but definitely without the toast. Don't attempt to eat any bread for a few days either - even the softest white kind. Bread is actually quite acid.

I know this is unpleasant and scary, and I do wish doctors would warn their patients about it in advance. However, you haven't been harmed by the procedure.

The only symptoms you need to worry about are vomiting blood or what looks like coffee grounds (which is partly digested blood) or passing foul-smelling black diarrhoea which looks like tar - and is in fact fully digested blood. In the absence of either of these symptoms - which are extremely rare following endoscopy - you're just going to have to wait it out till your throat settles. If you're not able to eat much, don't forget to drink plenty of water, preferably in small, frequent sips, to avoid getting dehydrated.

I hope you'll soon be feeling better.