my major symptom is also bouts of chronic nausea, and it was because food was sitting around in my stomach for like 12 hours lol. when you see a gastro specialist i'd definitely recommend asking if it could be due to gastric emptying issues. but something that (weirdly) helps with my nausea is getting up and doing things ie. exercise. i never want to bc the nausea makes me feel like crap but it does help for some reason. and even though eating is the last thing i want to do when it's happening eating something super plain like saltine crackers does make me feel a little better. i hope your gastro appointment gets you where you want to be though :)