If this were the case, you should limit your consumption of SOx to 385 micrograms per day. Since sulfur oxides are in so many foods, sorting out your sensitivity from your recollection of what you have eaten may only give you a general idea of your tolerance. And, since some additives don't cause problems for 24 hours, it is very easy to get confused and come to false conclusions. Like me, you may be tempted to experiment with your sensitivity to sulfites by eating foods not normally on your diet. I do not recommend such experiments.
Sulfite experiments can be dangerous.
I recommend only that you monitor your normal eating habits. If you cannot accurately determine your sensitivity to sulfites by just recalling what you have recently, perhaps a food diary will help. Just write down everything you eat and note the date and time. Also, record any health problems that occur over the same period. Monitor your diet for at least one week.