I noticed that my sinus symptoms greatly improved when I stopped
eating the
foods that were causing me so much trouble. All the food items
you mentioned are big problems for me, too.
To me what you've described doesn't sound so strange at all, because that's been my own experience, too.
My mother told me that I had food allergies as a baby. Everyone thought the food allergies had disappeared, since I didn't have such obvious outward symptoms any more.