Boyfriend has a stomach ache - worrying before anything even happens

I've been with my boyfriend almost 5 years and neither of us have been poorly in that time (other than having covid a bunch).

Today he starting complaining of a stomach ache right after eating lunch. I doubt it was the food because it was all fresh and inert (eggs, bread etc). He's been gassier than usual, the pain is lower stomach and to his right side (not appendix, he's had it removed). He's had random stomach aches before (lord knows I am the no.1 master of random stomach aches) and his have always turned out to be H.Pylori or nothing.

It's always been one of my "what ifs' that I know all us emetophobics deal with. We live in a 1-bed flat together. I've wondered when the day came, would I leave him to deal on his own? I wouldn't want to because that feels mean but he is much tougher than me when it comes to illness and is not prone to anxiety like I am.

I posted in this community (rather than r/emetophobia) because I'd really like to hear some positive stories about how people have dealt with these situations.

Please do share