Can any of you tolerate wheat? What symptoms do you get if not?

My allergist has reccommended avoiding wheat as it’s a very common trigger but I hadn’t actually noticed it. Maybe it’s because I hadn’t considered it, but the only possible symptoms I can think it could be causing is fatigue, brain fog and headache, GERD, maybe some of my GI symptoms. I did just eat some breakfast with wheat in and it’s an hour later and I’m feeling really tired and can’t concentrate at all. Is it worth cutting it out to see?