It might have to do with post-food poisoning complications.
Why not everyone else you might ask, but it could have to do with the fact
that "a very busy life" could actually mean that you are worn down and have a lot of stress. This would leave you more vulnerable.
There are too many variable factors, to confirm anything specifically.
Would you care to expand on the "sane issues accruing" ?
What symptoms are you exactly experiencing?
Please post again with these details.
Best wishes,
Niko