Why won't anything help my stomach issues?

Almost everyday it's a fight with my stomach. Even on days that I don't eat much I still end up in the bathroom multiple times. I'm vegan and eat fairly healthy and drink tons of water. When I wake up in the morning It's straight to the bathroom and I stay in there for almost an hour. Somedays it's just the morning poo and gassy through out the day and that's it but other days it's multiple poo's and really gassy. I've tried probiotics and acid reflux medicine. My vitamins levels are fine. The only thing that helps is Alka-Seltzer and it just 2 tablets does the trick for the day but it has so much sodium. I exercise 4-5 days a week. I don't have health insurance and haven't for a while. Over the years my stomach has gotten worse it started with just cutting out coffee and that helped but now I'm out of ideas to help. Any advice would be amazing.