Hi, I Don't Usually Have Allergies, But My Eyes Are

Hi, I don't usually have allergies, but my eyes are red, itchy and watery. First time , a few weeks ago, I blamed it on new eye shadow. This time, I was working in the yard and they burned so bad, I couldn't open them for minutes at a time. All we were doing was picking up fallen branches. I'm using Naphcon A ... Benadryl at night and Clariton non-drowsy in the mornings. What else do I do?