I Recently Had An Anxiety Attack And Was Hospitalized Because

I recently had an anxiety attack and was hospitalized because my friend and I were unsure of what was happening. I have also experienced this sensation that the world is moving really quickly, but when I look around, it's moving slowly. I looked it up and it seems that I may suffer from derealization. Would my anxiety and the derealization be connected? How would I know if I am actually suffering from derealization?