I'm afraid to eat fish because i've read adults are often allergic to it. i have no food allergies but have many drug allergies and celiac. risky?

Not p[particularly: The fact that you have some drug allergies & celiac do not mean you are more likely to be allergic to fish. If the idea spooks you your doc can run a blood test to see if you have a fish sensitivity. Fish/nuts/cow/milk & wheat are common food allergy triggers but the vast majority of the worlds population is not allergic to any of them.