Ah, well the only advice I can give you then is to stay hydrated, if drinking water is difficult then eat ice chips, it's a good way to slowly hydrate your body without just dumping water into your stomach
Thank you very much, everyone. It means a lot to me... It should be gone within 2 days, it usually is.
I hope you're feeling better by now. I notice this was hours ago, so I hope everything's alright now!