I think you freaked out because you felt normal. Or even better than normal. That would be very common. Odd as it may sound, people with anxiety forget they are allowed to have some good days as well. Take away the anxiety and make them feel too relaxed and they think something must be wrong. Why? Because this is not normal to them. What do they do? They react to feeling this way by setting the mind racing. Instead of thinking ' this is amazing '. They panic. Because they are not used to feeling this good. Anxiety is normal to them. Not complete calmness. Calmness is weird to them. Bit like they go look for things to worry about. Just to get back to how they are used to feeling. I would say to be happy. Accept you will get those calm days. They can happen. Doesn't mean anything is wrong at all.