Constant Nausea and Bloating: What Can I Do?

I’ve had nausea, acid reflux, food intolerances, and liquid intolerances for some time now. I can’t drink water because it causes severe acid reflux, so I just drink sugar free Gatorade. I can hardly drink at all because after only a couple sips I feel full and sick. I drink about 20-30oz a day. (my stomach gets very upset and nauseous if I eat anything with a high water content, such as grapes, apples, or jello). I have to eat roughly every 30 minutes, and my stomach will only allow 2-3 bites of food. I wake up throughout the night to eat. I’ve lived like this for over a year. Lately every time I eat or drink I get nausea, and bloated feeling more so than usual. And it seems to be with every food/drink that my stomach does tolerate: Soup, bread, crackers, Gatorade (sf). Some stuff has less of that effect, such as plain scrambled eggs or some banana. I’ve been waiting to see a GI doctor for months, but everyone’s booked out by at least 8 weeks, and I have tried to get the doctor to mark my case as urgent since there’s a lot more going on than just what im writing here, but nobody seems to care. What can I eat/stop eating to get the bloating and nausea to stop? Im tired of living like this. Every waking moment is hell.