chronic nausea

hii! again, very new to recovery/this subredddit so hopefully this isn't seeking reassurance? but if it's worded weird feel free to take it down.

my biggest issue with my emetophobia currently is my chronic nausea. at this point i'm somewhat able to tell when anxiety is making me nauseous, but i'm often nauseous even when there's nothing anxiety-inducing going on. likely ibs or an unrelated issue going on alongside it. either way, this is making thought reframing/exposure difficult since i know it isn't unreasonable for me to believe i will feel sick after eating. does anyone have advice for learning to navigate/cope with nausea so i can better manage it during exposures? i'm aware that i need to sit with the nausea to learn to not be afraid of it. i just need advice for what to actually do while sitting with it. one of my biggest hindrances is fearing sitting with the nausea will make me gag. thanks!! :)