I know what I'm about to type sounds like a crock of shit, but I'm 100% serious.
When its pretty bad, try swallowing a tea spoon of vinegar. Just the normal 'sarsons' you have in the cupboard for chips - Nothing fancy...
It does actually work. Something to do with the acid in the vinegar neutralising the acid inside you. Obviously I'm not medically trained, but speaking from experience it did actually work for me
