My ADHD meds messed up my stomach - now what? :(

Okay! Back in January, I was diagnosed with ADHD and started stimulants. I got TERRIBLE heartburn the first three days, which went away. Fast forward a month and a half, and I got the worst heartburn of my life and thought I had an ulcer. What I didn't think about: I have suffered from GERD since I was about 21–usually, I can control it pretty well with diet. I didn't think about how, my meds (being stimulants), would largely do the same thing as caffeine (though caffeine never impacted me this much) for GERD. But it makes your esophageal flap thing lazy and then you get mega-heartburn. This means I can't take my meds anymore which sucks cause they were helpful, particularly with binge eating. Is anyone taking any non-stimulant meds they find helpful with binge eating and ADHD?