I had ear flushed 21 days ago they got all wax out. Is it possible to have ear wax impacted? Or is it likely to be Eustachian tube? Ear feels full.

So, what's the . problem? If your ear feels fine, yes ear wax can be impacted, but that would have been known when your ear was examined. Eustachian tube dysfunction can cause some ear symptoms, but you are symptom-free, so enjoy your health, best wishes .