Possibly Food Poisoning

So, I was pretty confused earlier about what was going on until the nausea set in.  Yeah, I don't think this is a typical aging thing or lack of exercise thing.  Still don't know what exactly this is yet, but food poisoning is a possibility.  So far it's not been more than moderately uncomfortable--hopefully goes away soon.  Not sure what I ate to bring this on.  Maybe a piece of fruit I ate was bad or something.  Unfortunately I don't even remember what I ate beyond the last couple meals before I started showing symptoms, and food poisoning can take longer than that to set in.  Not that knowing that would necessarily tell me what it was, either.