A tip for anyone who deals with chronic stomach issues or chronic illnesses that affect your stomach, anyone who deals with nausea, indigestion, or the like:
I make popsicles and keep them on hand. Lemon juice + ginger, lemon juice + mint, chamomile tea + lemon juice (this one is also great for stress, cramps, or to have as a snack before bed). You can do all sorts of combinations using juices, herbs, teas, etc. Whatever works for you and your symptoms, give it a try. If you don't have popsicle sticks, you can make ice cubes with the same things and suck on the ice instead.
It's something I've done for years now, and it's so helpful and handy to just be able to grab a popsicle when my chronic illness issues mess with my stomach (I deal with a lot of nausea, pain, and not always being able to keep food down, personally). It's especially nice in the summer.
They're fantastic for stomach issues. You can also add sweeteners like sugar syrups, honey, or similar, just be sure to research how your preferred sweetener freezes and holds up in the freezer.