The fact that you do not present with typical digestive symptoms will very much not connect your present neurologic symptoms to be of digestive origin. You did mention how ever that you have stomach disturbance which was not diarrhea
, pain etc (which are the usual symptoms of food poisoning
It is very possible that your symptoms could be due to food poisoning (even though atypical) but it will be best if you could allow your primary care
doctor take a look at it. I do believe that your symptoms will subside how ever in due time and might not even require any medical intervention.
Light-headedness can be simply (and most commonly) an indication of a temporary shortage of blood or oxygen to the brain due to a drop in blood pressure, rapid dehydration
from vomiting, diarrhea, or fever, or from playing a wind instrument.
Just get some bed rest while symptoms subside and you feel better. If symptoms persist despite bed rest, it is best you see your doctor.
Hope this helps