If you have celiac, do you eat non-certified gf foods?

Been gf for a while now and I’m not willing to try gluten again to find out fs if I have celiac. Let’s just say I’m pretty certain though due to my reactions and that cross contamination gets me big time (recently figured this out). Should I limit myself to only certified gf from now on (assuming I do have celiac) or are things without gluten ingredients okay?