Sounds like a couple of issues 1. On breathing 2. On digestion.
On breathing, take some extra deep/quick breaths before drinking. Like mild hyperventilating. This will get rid of some extra CO2 and allow you to “hold” your breath for longer than normal when drinking. All you need is a few seconds to be able to swallow. So don’t need to go overboard with the hyperventilating thing.
On digestion, sounds like classic gut issues. One of the drivers may be due to you not drinking enough water with the carbs you are taking on board. And an over-concentrated mix of sugar is just sitting in your stomach. This could be due to the breathing problems preventing you from drinking enough.
Sounds like you need to try a different nutrition and hydration strategy.
I keep my nutrition separate from my hydration. This way I can drink more water if I need to settle my stomach, vs having no choice but to ingest carbs any time I take a drink.