Suggest Treatment For Food Allergy And Food Poisoning

I've discovered that oysters cause me to vomit. In all cases, I was the only person who consumed them to fall ill with vomiting and nausea. Yet I don't have any other allergic symptoms like hives or problems breathing. I have no difficulties with other shellfish. I am sure I've eaten oysters in the past, especially as a child, with no problem, but oysters seem to be the common factor in the vomiting and nausea I've experienced over the past several years. I don't know know if the the oysters have always been raw in these instances because it took some time for me to realize that oysters are the common culprit. At least one instance of terrible vomiting occurred after eating canned smoked oysters. Last night I consumed a single raw oyster and experienced nausea and vomiting a few hours later. No one else became ill. I am wondering if I have a food allergy, food poisoning, or something else? Thank you so much for your help!