when i first moved in with my roommate, she was constantly throwing up and attributed it to some unexplainable chronic issue. after a year with me here, she's learned a lot about proper food preparation and storage, as well as having me sort of on top of managing groceries, and she almost never gets sick like that anymore.
anyway i think that woman might be one of a kind but just in case she's not: if you find yourself having frequent tummy troubles with no clear explanation... maybe just. try refreshing your food safety knowledge. (also don't forget to wash your water bottle). like, chances are you've been doing everything right and there's some other reason. but there's a nonzero chance that something you assumed was common sense is actually incorrect and you've been repeatedly making yourself sick.
people think kitchen management is totally easy and intuitive (prolly something to do with it being degraded as "women's work" but i digress) but there's science to food safety. and the people who raised you may have failed to teach you properly, whether through negligence or through not knowing everything themselves. it can't hurt to double check your knowledge here, just in case.