Anything I can do to prevent sickness? Is it likely I'll get sick? My stomach's been rumbling since I ate one-week-past-use-by-date cottage cheese an hour or two ago. It hadn't been opened yet, if that makes any difference. It tasted sour but I wasn't paying much attention so I ate more than I'd have liked before I finally caught on. I've had some bad seafood poisoning before and I'm now freaking out imagining the same type of thing kicking in any minute/hour now. I have a weak immune system so that makes me even more worried.